As a genetic counselor, you advise couples about the possibility of genetic disease in their offspring. This morning you met with an engaged couple, both of whom are phenotypically normal. The man, however, has a brother who died of Duchenne-type muscular dystrophy, an X-linked condition that results in death before the age of 20. The allele responsible for this disease is recessive. His fiancee, whose family has no history of the disease, is worried that the couple's sons or daughters might be afflicted.

Requied:
a. How would you advise this couple?
b. The sister of this man is planning to marry his fiancée's brother. How would you advise this second couple?

Answers

Answer 1

Answer:

a. This couple should not worry.

b. This couple should worry.

Explanation:

a. The man should not be worried. This is because he is normal (phenotypically).

b. They should be worried because the sister of the man can be a carrier of the recessive allele. If she was a carrier, then half of their male children can be affected.


Related Questions

Woodpeckers and squirrels fight for nesting rights in the same holes and spaces in trees, while the lions and cheetahs of the African savanna fight for the same antelope and gazelle prey. Which of the following statements about these relationships is accurate?

A. These are examples of competition because the organisms are fighting for resources.

B. These are examples of predation because the organisms are trying to take each other’s food and homes.

C. These are examples of predation because lions and cheetahs eat woodpeckers and squirrels.

D.These are examples of competition because no organisms are helped or harmed.

Answers

Answer:

a

Explanation:

both of the cases the organisms are fighting for a resource

A. These are examples of competition because the organisms are fighting for resources.

How Competition and predation are two different types of relationships ?

Competition and predation are two different types of relationships that can exist between different organisms in an ecosystem. Competition occurs when two or more organisms are fighting for the same resources, such as food, water, or shelter.

This can occur within or between different species. In the example given in the question, woodpeckers and squirrels compete for nesting rights in the same holes and spaces in trees, while lions and cheetahs compete for the same antelope and gazelle prey.

On the other hand, predation occurs when one organism (the predator) hunts, kills, and consumes another organism (the prey). This type of relationship is often seen between carnivores and herbivores, or between animals and insects. In the example given in the question, lions and cheetahs are predators that hunt and consume antelope and gazelle prey.

It is important to note that in both competition and predation, one organism may benefit while the other is harmed.

For example, in predation, the predator benefits by getting food while the prey is harmed by losing its life. In competition, one organism may gain access to the resources while the other loses out, which can affect their ability to survive and reproduce.

Learn more about predation at:

https://brainly.com/question/28871161

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"In rabbits, B = black fur and b = white fur. If fur color is an incomplete dominance trait, what phenotype will a
heterozygous rabbit show?"

Answers

Answer:

b is the answer my friend. hope this will solve your problem. mark me as brainliest

Is the following sentence true or false? Liquid magma is formed when small amounts of mantle rock melt?

Answers

Answer:

Absolutely True!

Explanation:

Which is not true about protein denaturation ?
a. can be induced by eat and extreme pH
b. Disturbs protein folding,
C. The primary structure of the protein rentains intaca hotarected by denaturation,
d. The protein remains functional after denaturation,​

Answers

D it is not functional
When a protein is denatured it becomes inactive. Therefore D will be our answer

The heart is important for transporting oxygen to the muscles when we exercise. How does the heart rate change when we go from sitting on a chair to running up the stairs?
A. The heart rate stops.
B. The heart rate gets slower.
C. The heart rate gets faster.
D. The heart rate stays the same.

Answers

Answer: C. The heart rate gets faster.

Explanation:

its true also give brainliest

The heart rate gets faster

Explanation:

C. Because when you are sitting your heart rate is chill put if you're moving really fast that means your heart rate is going up because you have to deep breaths over and over when you stop running.

There are more than 300,000 species of plants that have been identified thus far in the world today; many new species are being discovered each year. In addition to providing most of the oxygen for land animals, plants do many other things for us. you will research the Internet and use reliable and credible scientific websites to investigate a specific plant species and choose a way (other than providing oxygen) that plants are useful to humans. [NOTE: Hot topic plants like Marijuana and Opium are off limits and cannot be discussed.]
Writing a full paragraph (a 150-words minimum) for your initial blog post discussing a specific species of plant and the benefit you chose. Be sure to describe what type of plant it is. Where is it found? How does it impact humans or other species? What role does it play in the ecosystem, etc.?

Answers

Answer and Explanation:

We can mention the advantages of the plants of the Fabaceae family, also known as legumes, such as beans, soybeans, peanuts and peas. First, we must mention how these plants have high nutritional values ​​providing high levels of iron and nitrogen that are essential elements for human health. However, a benefit that these planats produce and that is important on a worldwide scale is the fixation of nitrogen in the soil. All living beings need nitrogen in their bodies, since nitrogen is a primary element in the composition of nucleic acids and proteins. Animals are able to ingest nitrogen from the vegetable diet, but vegetables cannot absorb nitrogen from the atmosphere or nitrogen from the soil, because they are not in molecular forms that plants can absorb. To reverse this, farmers put chemical fertilizers on the plantations, but these fertilizers pollute the environment intensely. It is in this scenario that the plants of the Fabaceae family are important. This is because these plants are able to associate with bacteria that can capture atmospheric nitrogen and place it in the soil, in the molecular form that all plants can absorb. This allows plants to have the necessary nutrients for their growth, reduces environmental pollution, decreases spending on agricultural production, promotes correct levels of nitrogen for human consumption and allows agricultural products to be healthier.

What season is it in Buenos Aires when it is winter in Boston, Massachusetts? Winter Summer Spring Autumn

Answers

Answer:

Spring is ur answer

Explanation:

Answer:

summer :)

Explanation:

WHAT
IS
Photo Synthesis​

Answers

Answer:

The process by which green plants and other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Explanation: Hope this helps!

1. Explain where most of your food originally came from and how your cells obtain and use that food.

Answers

Answer:

the food that we eat are used up by the cells to perform different activities such as metabolism.

Once we digest foods in our stomach, this substance is then moved to the small intestine where red blood cells pick up these protein molecules and bring it to other cells. Our cells then absorb these nutrients and use the mitochondria to make use of it and convert into energy (ATP).

Napollion Crossing The Alps​

Answers

Answer:

Napoleon Crossing the Alps (also known as Napoleon at the Saint-Bernard Pass or Bonaparte Crossing the Alps; listed as Le Premier Consul franchissant les Alpes au col du Grand Saint-Bernard) is a series of five oil on canvas equestrian portraits of Napoleon Bonaparte painted by the French artist Jacques-Louis David ...

Explanation:

please give me brainlist and follow

HURRY
Which combination of sex chromosomes results in a male human being? *
1 point
XX
YY
XY
either XX or YY

Answers

Answer: it's XY

Explanation:

Please give me the correct responses.Only answer if you're very good at science/biology.Please don't put links to websites or else I'll report you.

Scientists believe Polar Bears have evolved from a group of Brown Bears that became an isolated population during a time when the Earth's climate began cooling down.What are some adaptations that make Polar Bears different from Brown Bears and what do you think caused the adaptations to occur?​

Answers

Answer:

One adaptation is white fur. There was probably one white cub born to a brown bear mother, and the fur helped camouflage it for safety and later, hunting. This bear would have been more successful in hunting in the arctic, so it was more likely to reproduce and pass on the white fur genes. A second adaptation is the long claws of brown bears that are used for digging through vegetation would have shortened to be safer on ice. Polar bear paws also have little sticky bumps on their paws for gripping ice.

A third adaptation is that polar bears don't hibernate in winter. In winter, there is a lot more food available to them, so they need to stay awake. A fourth adaptation is their hair is also now water repellent, because most of their food comes from the sea. A fifth adaptation is in their digestive system. Polar bears don’t digest carbohydrates as well as brown bears, because their diet has much more fat than anything else. Polar bears hunt seals and can convert the blubber into fat for their bodies to live off of when food is scarce.

how is zero, oxidation numbers, and noble gases related​

Answers

Of its valence electrons or the no. Of valences in its Valence shell .In case of noble gases, their outermost shell is absolutely crammed so no emptiness is available in the outer maximum shell. Thus the oxidation kingdom is 0(zero)for Noble gases. Because, they've complete electrons in their out maximum shell.

hope this helps

what is cell and its function​

Answers

Cells are the basic building blocks of all living things.

They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.

[tex]\sf\huge\underline\purple{Cell:-}[/tex]

Definition:-

“A cell is defined as the smallest, basic unit of life that is responsible for all of life’s processes.”

[tex]\rightarrow[/tex] Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life.

[tex]\rightarrow[/tex]Each cell contains a fluid called the cytoplasm, which is enclosed by a membrane. Also present in the cytoplasm are several biomolecules like proteins, nucleic acids and lipids.

[tex]\sf\large\underline\purple{Functions:-}[/tex]

Following are the various essential functions of cells:

Cells provide structure and support to the body of an organism.The cell interior is organised into different individual organelles surrounded by a separate membrane.The nucleus (major organelle) holds genetic information necessary for reproduction and cell growth.Every cell has one nucleus and membrane-bound organelles in the cytoplasm.Mitochondria, a double membrane-bound organelle is mainly responsible for the energy transactions vital for the survival of the cell.Lysosomes digest unwanted materials in the cell.

______________________________

What type of plate boundary iS shown in the diagram?
O A. Subduction boundary
O B. Convergent boundary
• C. Divergent boundary
O D. Transform boundary

Answers

Answer:

I believe it is C. Divergent boundary

Answer:

C

Explanation:

If HH crossed with Hh. What would be the probability of hh?

Answers

Answer:

The probability would be 0%

1. Which of the following events is not a source of genetic variation in eukaryotic organisms?

J. Mutation
K. Independent assortment
L. Mitosis
M. Fertilisation

Answers

Answer:

Mitosis

Explanation:

Mitosis is not a source of genetic mutation because it take place mostly in the somatic cells. This is because it does not lead to the production of gametes . In mitosis, the parent cells divide into two daughter cells and each daughter cells are genetically identical to the parent cell because they carry the same number of chromosomes as the parent cell. There is no genetic variation in this.

What are there scientific name.

Please Answer​

Answers

Answer:

manubruim = trapezoid

I hope it helps you

2. Natural selection is an example of a mechanism of evolution. Does this mechanism produce a change
in individuals or populations? Explain.

Answers

Answer:yes

Explanation:natural selection does produce a change in individuals as well as populations. Explanation: Natural selection is a process through which mother nature screens for the organisms that are best adapted to survive in a habitat.

elect all statements that accurately describe the structures or functions of mitochondria. Mitochondria are the sites of aerobic metabolism. Mitochondria have a permeable inner membrane and an impermeable outer membrane. Mitochondria regulate apoptosis. Mitochondrial DNA is packaged with histones. The configuration of mitochondria does not change. Mitochondria are included in the endomembrane system.

Answers

Answer:

The correct statements are -

Mitochondria are the sites of aerobic metabolism

Mitochondria regulate apoptosis.

Explanation:

Mitochondria is one of the eukaryotic cell organelles that are double membrane and plays important role in the different function of the cell. The main and major function of the mitochondria is aerobic metabolism that includes aerobic respiration where glucose converts into carbon dioxide and water with releases a high amount of energy in the form of ATP.

These also plays important role in programmed cell death or apoptosis it activates apoptosis by releasing protein by the inner and outer membrane. The inner membrane of mitochondria is impermeable and allows through transporters and outer membrane non-specifically permeable to low molecular substances. Mitochondrial DNA lacks histone protein and  TFAM, an HMG-like protein involved in the process.

When considering the entire period of time during which life on Earth has been evolving, we must look at:

thousands of years
hundreds of millions of years
hundreds of years
billions of years


millions of years

Answers

Answer:

we must look at billions of years

When considering the entire period of time during which life on Earth has been evolving, we must look at: D. billions of years.

Evolution can be defined as a process of gradual change in the characteristics of various species of living organism over several generations.

Basically, these characteristics refer to gene expressions that are typically transferred from parent organisms to their offspring or successive generations.

The earliest life forms known to humans existed about 3.7 billion years ago and they are microscopic organisms (microbes) whose fossils were found on rocks.

In conclusion, when you are considering the entire period of time during which life on Earth has been evolving, you must look at billions of years.

Read more: https://brainly.com/question/23088172

Haploid cells have _____ and diploid cells have _____ of its DNA.

A.
two copies, one copy
B.
one copy, two copies
C.
two copies, four copies
D.
one copy, four copies

Answers

Answer:

B. one copy, two copies

Explanation:

Haploid is 23 chromosomes, so there is one copy of each human chromosome while diploid is 46 chromosomes, so there are two copies of each human chromosome.

Halpoid refers to a cell with a single set of chromosomes

Diploid refers to a cell with two sets of chromosomes.

Use the drop-down menus to choose the correct answer to complete each statement
An object that revolves around a planet is a
Jupiter is considered a
A large body in space that revolves around a star and does not give off light is a

Answers

Answer:
Moon, planet, planet
Explanation:
Moons revolve around planets, Jupiter is considered a planet because it revolves around the sun, and a planet is a body that revolves a star.

Answer:

Moon, planet and planet

Explanation:

What is included in Earth’s hydrosphere?

Answers

Answer: The hydrosphere includes water that is on the surface of the planet, underground, and in the air. A planet's hydrosphere can be liquid, vapor, or ice. On Earth, liquid water exists on the surface in the form of oceans, lakes and rivers. It also exists below ground—as groundwater, in wells and aquifers. brainliest?

Explanation:

Answer:

Explanation:

..........................

Explain the relationship between mutations, adaptations,
natural selection, and extinction.

Answers

Answer: A mutation results in different alleles for a gene and these different alleles will cause adaptations that may be favorable or unfavorable. If no species in an area has adaptations suited for the environment after it changes, extinction will occur.Adaptations result from random mutations in the genes of organisms. Depending on the environment, these adaptations may be favorable or unfavorable. If an adaptation is favorable, it is selected by nature and, over time, more and more organisms in a population will have it. If the environment changes so much that the adaptations of a species are no longer enough for the species to survive, extinction will occur.Mutations is very different because it results in different alleles for a gene.Adaptations is where an animals ADAPTS to an environment.Natural selection consists of overproduction,variation, favorable adaptations.extinction is when a species completely disintegrates.

Explanation:

Answer:

A mutation results in different alleles for a gene and these different alleles will cause adaptations that may be favorable or unfavorable. If no species in an area has adaptations suited for the environment after it changes, extinction will occur.Adaptations result from random mutations in the genes of organisms. Depending on the environment, these adaptations may be favorable or unfavorable. If an adaptation is favorable, it is selected by nature and, over time, more and more organisms in a population will have it. If the environment changes so much that the adaptations of a species are no longer enough for the species to survive, extinction will occur.Mutations is very different because it results in different alleles for a gene.Adaptations is where an animals ADAPTS to an environment.Natural selection consists of overproduction,variation, favorable adaptations.extinction is when a species completely disintegrates.

Explanation: got it on ed :)

Which component of biodiversity takes into account the number of different habitats and niches present in an ecosystem?

Select one:
A. Genetic
B. Stabilizing
C. Ecosystem
D. Species

Answers

Answer:

D is the answer hope it helps

Why can hurricanes be difficult to predict

Answers

It’s is difficult bc the lack of data, difficult to predict the status of a storm.

Proteins are:
a. Resistible to structural changes.
b. Polymers of amino acids bound by peptide bonds.
c. Have different structures but same function.
d. All hydrophilic​

Answers

Hello there!

Proteins are created by the bonding of amino acids. The bonds are called peptide bonds.

So the answer must be b.

I hope this helps!! :)

B. The polymers of amino acids are bounded by peptide bounds or polypeptides

Assume that you discover a new human gene that you believe is located on the Y chromosome although not in the region (pseudoautosomal) of the Y that is homologous with part of the X chromosome. How would you map this gene with respect to the other genes on the Y chromosome

Answers

Answer:

by performing a bioinformatic analysis in order to discover Y chromosome-linked mutations associated with defective phenotypes. In this case, it is expected to discover two or more loss of function mutations located in the coding region of the target gene on the Y chromosome in different males, and then associate such mutations with altered phenotypes caused by the inactivation (loss of function) of this gene

Explanation:

The genes located on the Y chromosome exhibit a uniparental mode of inheritance (i.e., these genes are only transmitted from father to their sons). This situation makes difficult to map the target gene since recombination does not occur for genes that are only located on the Y chromosome, hampering the development of a linkage map containing this gene. In this case, it is possible to directly associate genetic mutations located at the same genomic region (locus) on the Y chromosome with a particular altered phenotype in males carrying these mutations, which can be in principle associated with the inactivation of the target gene (loss of function mutations) in these individuals.

The brain send signals that control the speed at which food moves through the digestive system. What systems are involved?
A.Circulatory, Immune, digestive
B.Muscular, Digestive, Immune
C.Digestive, Muscular, Nervous
D.Respiratory, Endocrine, Digestive

Answers

C. Muscular digestiv nervous
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