Petunia flower color is governed by two alleles, but neither allele is truly dominant over the other. Petunias with the genotype R1 R1 are red-flowered, those that are heterozygous (R1 R2 ) are pink, and those with the R2 R2 genotype are white. This is an example of incomplete dominance. (Note that superscripts are used rather than upper- and lowercase letters to describe the alleles).
a. If a white-flowered plant is crossed with a red-flowered plant, what is the genotypic ratio of the F1?b. What is the phenotypic ratio of the F1?c. If two of the F1 offspring were crossed, what phenotypes would appear in the F2?d. What would be the genotypic ratio in the F2 generation?
Answers
Answer:
a. 4 R¹R²
b. 4 Pink flowers
c. 1 Red, 2 pink and 1 white phenotypes
d. 1R¹R¹ : 2R¹R² : 1R²R²
Explanation:
This question involves a single gene coding for flower color in petunia plants. However, the allele for red flower color (R¹) is incompletely dominant over the allele for white flower color (R²), hence, a pink intermediate phenotype (R¹R²) is formed.
According to these questions;
A. If a white-flowered plant (R²R²) is crossed with a red-flowered plant (R¹R¹), all of the F1 generation will have a genotype of R¹R² (see attached image for punnet square).
B. The F1 generation, which possess a genotype: R¹R² will express the pink flower phenotype because neither of the two alleles are truly dominant over the other i.e incomplete dominance.
C. If two of the F1 offspring were crossed i.e. R¹R² × R¹R², each parent will produce R¹ and R² gametes. Using these gametes in a punnet square (see attached image), the following phenotypes will be produced in the F2 generation: Red, pink and white phenotypes
D. The F2 generation will possess a genotypic ratio of 1R¹R¹ : 2R¹R² : 1R²R².
Related Questions
Using the concepts of chain of custody it is important to (multiple answer) A. document everyone who has handled the evidence prior to a trial B. record the dates and times of the possession of the evidence C. have a complete inventory of the evidence D. weight all of the evidence E. seal all of the evidence in air tight bags
Answers
Answer:
A. document everyone who has handled the evidence prior to a trial
Explanation:
A chain of custody can be defined as a paper trail containing the chronological order of items of evidence and how they have been handled, controlled, transferred, analyzed, and disposed during the investigation of a case.
This ultimately implies that, a chain of custody contains all the details or informations regarding the investigators (people) who handled, controlled, transferred, analyzed, and disposed an evidence in the course of carrying out investigations on a particular case. The most important and significant part of an investigation is the evidence because it helps to unravel the truth and facts relating to a case. Therefore, it is very important and essential to document and maintain a chain of custody so as to preserve the evidence.
Hence, using the concepts of chain of custody it is important to document everyone who has handled the evidence prior to a trial.
Which of the following dietary fats is considered to be the least healthy?
Trans unsaturated fat
All dietary fats are unhealthy
Cholesterol
Saturated fat
Answers
Fats that increases the bad cholesterol in the body are considered worst. Thus, Trans unsaturated fat is the correct answer.
What are trans fat?Unsaturated fatty acids have the presence of double bonds. This double bond is either 'cis' or 'trans' in origin.
When the unsaturated compounds are linked through trans bond, they form trans fat.
Trans fat are produced through chemical reaction. This reaction is termed as partial hydrogenation.
Trans fats have shown potential damage to the human body in research studies. Trans fat raises the bad cholesterol level (more lipid, less protein) in the body.
This can lead to several heart disease, liver damage or even atherosclerosis. Such diseases can be life threatening.
Trans fat are found mainly in fried and processed food. The junk food also contains high levels of trans fat.
Therefore, consumption of trans fat should be avoided for health safety.
Learn more about trans fat, here:
https://brainly.com/question/10509593
#SPJ2
Diagrams 1 and 2 show cells from an organism with a diploid chromosome number of 4.
> >
x x
1
2
Refer to the illustration above. Which of the cells will be a diploid cell at the completion
of division?
Answers
Both the cells will be diploid cells at the completion of division. Therefore, the correct option is B.
In diagram 1, the chromosomes are in the metaphase of cell division, that is aligned at the centre of the cell. In the next phase which is anaphase, these chromosomes are pulled apart by the spindle fibres in opposite directions. As a result, the chromosomes are split into half and each cell gets half the number of chromosomes in the form of chromatids. Thus, each cell will have 4 chromatids.
In diagram 2, the chromosomes are in the early anaphase stage. When the cell will split into two, each daughter cell will have 2 chromosomes. These chromosomes separate in the telophase and thus, each cell will have 4 chromatids.
Learn more about cell division in:
https://brainly.com/question/15286135
#SPJ1
In what area of the world does the low pressure area stay in the winter? Why?
Answers
Answer:
Atlantic because minuses 0 degrees
PLEASE HELP ASAP! WILL GIVE BRAINLIEST TO CORRECT ANSWER! HELP!! HELP!!
The diagram shows the structure of an animal cell.
The image of an animal cell is shown with some organelles labeled numerically from 1 to 6. The outer double layer boundary of the cell is labeled 1. A stacked disc like structure is labeled 2. A broad rod shaped structure with an irregular shape inside it is labeled 3. The entire plain section that forms the background of the cell and is within the outer boundary is labeled 4. A small circular shape within the large circular shape is labeled 5. The large central circular shape is labeled 6.
Which number label represents the cell membrane?
1
2
4
6
(this is middle school science)
Answers
Answer:
4
Explanation:
Answer:
4
Explanation:
I took the test
Select the correct statement(s) about angiosperm seeds. Select all that apply. Select all that apply. The embryo in an angiosperm seed is the offspring of the sporophyte plant. All structures in an angiosperm seed are diploid. An angiosperm seed contains structures contributed by three generations of plants.
Answers
Answer:
An angiosperm seed contains structures contributed by three generations of plants.
Explanation:
The spermatophytes, also known as phanerogams, represent a group of seeded plants that have developed special structures for reproduction. This group (spermatophytes) consists of gymnosperms or 'naked seeds', and angiosperms or 'enclosed seeds'. The seed is an organ generated from the ovule after fertilization by the pollen grain, which gives rise to a seedling during the process of germination. In flowering plants, seeds are generated by a process of double fertilization and consist of three tissues: 1-an embryo (generally diploid) formed by repeated mitotic division of the zygote cell, 2- an endosperm tissue (generally triploid, 3n) that nourishes the embryo during its growth, and 3-a seed coat generated from the integuments of the ovule. In angiosperms, seeds consist of three generations: the gametophyte that provides nutrients to the embryo, the embryo, and the seed coat which is generated from the parental tissue (sporophyte).
A particular mountain stream is home to a population of salamanders that are red in color. In the past year, a second population of salamanders that are dark blue in color moved into the same
stream. Scientists researching the stream have recently discovered young salamanders that are red with dark blue patches on their bodies.
What can the scientists conclude from this evidence?
The Salamanders are suffering from a bacterial disease
The salamanders are on the verge of becoming extinct
The Salamanders undergo sexual reproduction
The Salamanders undergo sexual reproduction
Answers
1.An increase in the population of an organism would most likely be associated with which of the following?
A.an increase in animals that prey on an organism.
B.A decrease in necessary resources.
C.An expansion of suitable living space.
D.A series of severe weather events in the habitat.
Answers
Answer:
a series of severe weather events in the habitat
An increase in the population of an organism would most likely be associated with a series of severe weather events in the habitat. The correct option is D.
What is the population?A collection of creatures from the same species that can interact to create fertile progeny. It is on a level above organisms but below the ecosystem and community.
An ecosystem is a level of organization where several communities of various species and the associated abiotic elements interact. It is the place where different population interacts with each other.
A biosphere and a biome are larger organizational levels than this one. Communities are levels of the organization where various populations coexist and engage in social interactions.
Therefore, the correct option is D. A series of severe weather events in the habitat.
To learn more about the population, refer to the link:
https://brainly.com/question/22336800
#SPJ6
How does washing your hands with soap inactivate coronaviruses that may be on your hands?
Answers
Answer:
Soap has chemicals that kill bacteria
When you wash your hands with soap and water, you surround any microorganisms on your skin with soap molecules. The hydrophobic tails of the free-floating soap molecules attempt to evade water; in the process, they wedge themselves into the lipid envelopes of certain microbes and viruses, prying them apart.
Yea I copied it owo
Emily's dog has puppies. 3 puppies are brown and 2 puppies have spots. The difference in their coat color is known as A trait B feature r variation
Answers
Answer:
What
Explanation:
Answer:
This is known as A. Trait
the producers had 6,000 kcal of energy , how much would be passed to the primary consumer?
Answers
Answer:
600 kcal
Explanation:
In an ecosystem, energy is transferred from one organism in a trophic level to another organism in another trophic level. Organisms called PRODUCERS are capable of deriving energy from the sun. However, when fed upon by PRIMARY CONSUMERS, only about 10% of the energy is transferred to them because most of the energy (90%) is lost as heat.
Hence, in this case where the producers had 6,000 kcal of energy, 10% i.e. 10/100 of 6000 = 600 kcal of energy will be transferred to the primary consumers.
Which of the following statements about the cells of any multicellular organism is true? More than one answer may be correct.
Answers
Answer:
C.) (Different genes are expressed in different types of sells.)Explanation:
I hope its help;)(;How does energy and matter move through the ecosystem
Answers
Answer:
Using the food chain which originates from the sun's energy.
Explanation:
Answer:
matter moves through an ecosystem through the recycling of energy and nutrients between different trophic levels. The first trophic level consists of primary producers like plants that can be manufactured their own food through photosynthesis. Similarly plants are require nutrients like nitrogen to grow.
Explanation:
Image result for How does energy and matter move through the ecosystem
In ecosystems, matter and energy are transferred from one form to another. ... Decomposers break down dead plant and animal matter. Producers (plants) use sunlight and other nutrients to make their own food through photosynthesis. Consumers are the animals that consume, or eat, other living things.
Which describes what happens when cooler
air particles come into contact with the
warmer ground?
A) The particles do not interact.
B Energy is transferred from the cooler
air to the warmer ground.
©
Energy is transferred from the warmer
ground to the cooler air.
The particles'move back and forth
between the air and the ground.
D
Answers
Answer:
B. Energy is transferred from the cooler air to the warmer ground.
Explanation:
When cooler air particles come into contact with the warmer ground, energy is transferred from the cooler
air to the warmer ground.
Answer: The temperature of air would decrease.
Explanation:
The energy gets transferred from hot object to cold object until the two objects are in thermal equilibrium. When air transfers energy to a cooler object, it means the air it self is cooling down till the air and the object are in thermal equilibrium. Thus, the temperature of air would decrease.
The endocrine system and the nervous system both send messages that control processes in other parts of the body. Which is an example of a process caused mainly by the endocrine system?
A. developing allergies to pollen, pet hair, or specific foods
B. regulating growth and functions of certain body organs
C. improving your skills at a sport or other physical activity
D.pulling your hand away when you touch a hot stove
Which picture above accurately shows an example of the circulatory organ system in a zebra?
A. figure 2
B. figure 3
C. figure 4
D. figure 5
Answers
Figure 3. A heart is a main part of the circulatory system.
Which energy source provides most of the world's energy consumption?
natural gas
hydroelectric
solar
fossil fuels
Answers
Answer:
The energy source which provides most of the world's energy consumption is
Explanation:
Ans = Hydroelectric
Which of the following is another way to refer to body cells?
a. sex cells
b. gametes
c. mitosis
d. somatic cells
Answers
Answer:
: somatic cell —opposed to germ cell. 2 : the one of two cells produced by division of the generative cell in the pollen grain of certain gymnosperms that in turn divides to produce two male nuclei or cells
Answer:
D is the answer I'm pretty sure :)
The volume of a liquid is often given in a. meters. c. liters. b. centimeters. d. square units. Please select the best answer from the choices provided A B C D Mark this and return
Answers
Answer:
C
Explanation:
Liters is a normally used measurement for liquids.
Choose the word that best completes each sentence. Angiosperms’ anchor them in the ground and absorb water for the plant. Their stems provide support to the plant and connect the roots and leaves. Their capture the sun’s energy and use it to make food through the process of photosynthesis. Angiosperms’ contain the reproductive parts of the plant. Their protect and help spread the seeds.
Answers
Answer:
Root anchor them in the ground and absorb water for the plant. Woody stem provides support to the plant and connect the roots and leaves. Leaves capture the sun's energy and use it to make food through the process of photosynthesis. Flowers contain the reproductive parts of the plant. fruite protect and help spread the seeds.
Explanation:
Answer:
roots, leaves, flowers, fruits
Explanation:
which organelles are important to the life process of metabolism
Answers
Answer:
Cellular Metabolism
Explanation:
Im pretty sure thats it!
Answer:
the mitochondrion and the chloroplast.
Explanation:
HELPPPPPPPPPPPPpbdishejwieieie
Answers
Answer:
B
Explanation:
5) If a body cell contains 50 chromosomes, how many
will exist in its gametes?
25
Answers
Answer:
25
Explanation:
gametes are haploid cells and body cells are diploid. when a diploid cell undergo meiosis it will produce haploid gametes with half number of chromosomes. in this case body cell has 50 chromosomes so their gametes have only 25 chromosomes.
Where does competition for reproduction mostly likely occur
Answers
4. Is there a relationship between the number of black boxes and any of the water pumps. Be specific and detailed in your answer. .
Answers
Answer: Cholerae is fecal contamination of water, meaning people can only get this by using or drinking the contaminated water. If a water pump has the contaminated water, boxes near that water pump will seem higher than areas with clean water.
Explanation:
a _____ time scales divides earths history into divisions that are based on major changes in geology, climate, and the evolution of life
Answers
Members of the Kingdom Plantae are characterized by _ while members of the Kingdom Fungi are characterized by ---
cell walls of cellulose; cell walls of chitin
heterotrophy, autotrophy
mostly unicellular organisms; having segmented bodies with jointed appendages
having segmented bodies with jointed appendages; mostly unicellular organisms
d
Answers
Answer:
Heterotrophy, Autotrophy
Reasoning: Heterotrophy organisms are organisms who can't retrieve food themselves and use energy and sunlight in order to get their food, which is exactly what plant cells do. Autotrophy is the ability to produce things such as carbon dioxide and oxygen, which plants do as well. Hence, Heterotrophy and Autotrophy are the most reasonable answers.
The central dogma describes which of the following?
the process by which enzymes are modified after translation
the way DNA is replicated
the flow of genetic information
the way RNA is used as a template to make DNA
Answers
Answer:
The correct answer is - the flow of genetic information.
Explanation:
The process includes the flow of genetic information or instructions encoded in DNA used to make or turn to a final product that can be DNA or protein, known as the central dogma.
Mostly central dogma term use for the protein synthesis from the DNA that takes place in the two steps, transcription is the first converts DNA into RNA and the second translation that converts product of the first step that is RNA into Protein. DNA → RNA → protein.
Thus, the correct answer is - the flow of genetic information.
The central dogma describes the flow of genetic information. The correct option is C.
A key idea in molecular biology known as the core dogma outlines how genetic information moves through cells. It says that RNA is translated into proteins from transcribed DNA.
This idea emphasises how genes are expressed and proteins are made in living things by sequentially transferring genetic information from DNA through RNA to proteins.
The fundamental dogma excludes DNA replication, the reverse transcription of RNA into DNA, and the process of post-translational enzyme modification.
Thus, the correct option is C.
For more details regarding central dogma, visit:
https://brainly.com/question/29549599
#SPJ6
Your question seems incomplete, the probable complete question is:
The central dogma describes which of the following?
A. the process by which enzymes are modified after translation
B. the way DNA is replicated
C. the flow of genetic information
D. the way RNA is used as a template to make DNA
PLEASE HELP !
this is any multicellular living thing that obtains energy from sunlight or makes it own food
= ??
Answers
Answer:
Autotroph
Explanation:
Which process is represented by the picture below?
A. Vegetative Propagation
B. Meiosis
C. Fertilization
D. Binary Fission
HELPP MEEE
Answers
Answer:
Meiosis is the correct answer
Hope this helped!
Explain how specific membrane-bound organelles of the keratinocytes are used to produce, transport, and modify aquaporin polypeptides from mRNA.
Answers
Answer:
Epidermis.
It is composed of keratinized, stratified squamous epithelium and is made up of 4 layers of epithelial cells depending on its location in the body. From deeper to superficial these layers are stratum Basale, stratum spinosum, stratum granulosum, and stratum corneum. The cells in all the layers except for stratum besele are called keratinocytes which is a cell that manufactures and stores the protein keratin.
Stratum Basale.
It is a cuboid-shaped stem cell that is a precursor of the keratinocytes of the epidermis. Two other cell types found in this basal cell are Merkel cells which function as a receptor and are responsible for stimulating sensory nerves that the brain perceives as touch. The second is melanocyte that produces melanin pigment which gives the skin its color.
Stratum spinosum.
It is spiny in appearance due to the protruding cell processes that join the cells via a structure called desmosome. The desmosome cell interlock with each other to strengthen the bond between the cell. Keratinocytes in the stratum spinosum stats synthesizing keratin and release water-repelling glycolipid that helps to prevent water losses from the body.
Stratum granulosum.
They are grainy in appearance due to further change in keratinocytes as they are pushes from the stratum spinosum. The cells become flat as their membrane thickens to allow the production of protein keratin which accolades as lamellar granules within the cells.
Stratum Lucidum.
It is a smooth and translucent layer of the epidermis situated above the stratum granulosum. Keratinocytes containing these cells are dead and flat. Stratum lucidum cells are packs with eleiden derived from keratohyalin which give these cells their transparency and provide a barrier to water.
Stratum corneum.
This is the most superficial layer in the epidermis and it prevents penetration of microbes and dehydration of underlying tissues.
Dermis.-This is the inner layer of the skin and has the following functions.
Reticular layer
Just below the papillary layer, we have a much thicker layer called the reticular layer composing of dense connective tissue. It contains elastin fibers providing elasticity to the skin enabling movement.
Hypodermis
Explanation:
Learn more:
brainly.com/question/12896973