Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 12, Problem 20RQ
Labrador retriever's fur color is controlled by two alleles, E and B. Any dog with the ee genotype develops into a yellow lab, while B_E_ dogs become black labs and bbE_ dogs become chocolate labs. This is an example of.____
- epistasis
- codominance
- incomplete dominance
- linkage
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Students have asked these similar questions
The ABO blood group in humans is based on the presence of three alleles in the population: IA, IB and i. The four blood types, A, B, AB, and O, result from different combinations of the three alleles. An individual with blood type AB reflects what type of interaction between these alleles?
dominance
incomplete dominance
codominance
epistasis
Based on the allelic gene interaction in Australian milking shorthorn cattle breeds, the mating of a red cattle (RR) and white cattle is depicted in the picture below. What is gene interaction involved in this resulting coat color of the offspring? see photo attached
a. Complete dominance
b. Incomplete dominance
c. Codominance
d. Additive gene action
In gerbils, the gene that specifies coat color is sex‑linked and has multiple alleles, as follows: B ‑ black, br ‑ brown, by ‑ yellow, and b ‑ albino. The allele br is incompletely dominant over by, the combination br by giving tan color; otherwise, dominance is in the order given ‑‑ B, br, by, b. (For your information, gerbils are mammals.)
A black gerbil mated with a yellow gerbil gave one brown male and one black female offspring.
A. What is the sex of the black parent?
b. What is the genotype of the brown offspring?
c. If the two offspring were to mate with each other, what is the probability that they will have a yellow offspring?
D.If the two offspring were to mate with each other, what is the probability that the first three female offspring will be black?
E.If the brown offspring were to mate with his mother, what is the probability that the first two offspring will be brown males?
Only answer d and e
Chapter 12 Solutions
Biology 2e
Ch. 12 - Figure 12.5 In pea plants, round peas (R) are...Ch. 12 - Figure 12.6 What are the genotypes of the...Ch. 12 - Figure 12.12 What ratio of offspring would result...Ch. 12 - Figure 12.16 In pea plants, purple flowers (P) are...Ch. 12 - Mendel performed hybridizations by transferring...Ch. 12 - Which is one of the seven characteristics that...Ch. 12 - Imagine you are performing a cross involving seed...Ch. 12 - Consider a cross to investigate the pea pod...Ch. 12 - A scientist pollinates a true-breeding pea plant...Ch. 12 - The observable traits expressed by an organism are...
Ch. 12 - A recessive trait will be observed in individuals...Ch. 12 - If black and white true-breeding mice are mated...Ch. 12 - The ABO blood groups in humans are expressed as...Ch. 12 - In a mating between two individuals that are...Ch. 12 - If the allele encoding polydactyly (six fingers)...Ch. 12 - A farmer raises black and white chickens. To his...Ch. 12 - Assuming no gene linkage, in a dihybrid cross of...Ch. 12 - The forked line and probability methods make use...Ch. 12 - How many different offspring genotypes are...Ch. 12 - Labrador retriever's fur color is controlled by...Ch. 12 - Which of the following situations does not follow...Ch. 12 - Describe one of the reasons why the garden pea was...Ch. 12 - How would you perform a reciprocal cross for the...Ch. 12 - Mendel performs a cross using a true-breeding pea...Ch. 12 - Calculate the probability of selecting a heart or...Ch. 12 - The gene for flower position in pea plants exists...Ch. 12 - Use a Punnett square to predict the offspring in a...Ch. 12 - Can a human male be a carrier of red-green color...Ch. 12 - Why is it more efficient to perform a test cross...Ch. 12 - Use the probability method to calculate the...Ch. 12 - Explain epistatis in terms of its Greek-language...Ch. 12 - In Section 12.3, ''Laws of Inheritance," an...Ch. 12 - People with trisomy 21 develop Down’s syndrome....Ch. 12 - A heterozygous pea plant produces violet flowers...
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- In gerbils, the gene that specifies coat color is sex‑linked and has multiple alleles, as follows: B ‑ black, br ‑ brown, by ‑ yellow, and b ‑ albino. The allele br is incompletely dominant over by, the combination br by giving tan color; otherwise, dominance is in the order given ‑‑ B, br, by, b. (For your information, gerbils are mammals.) A black gerbil mated with a yellow gerbil gave one brown male and one black female offspring. What is the sex of the black parent? What is the genotype of the brown offspring? If the two offspring were to mate with each other, what is the probability that they will have a yellow offspring?arrow_forward. In tigers, a recessive allele of a particular gene causes both anabsence of fur pigmentation (a white tiger) and a cross-eyed condition. If two phenotypically normal tigers that are heterozygousat this locus are mated, what percentage of their offspring will becross-eyed? What percentage of cross-eyed tigers will be white?arrow_forwardA graph of phenotypic variation similar to this image is indicative of __ (ex: height, weight, eye color) continuous variation incomplete dominance environmental variables on the phenotype epistasis multiple allelesarrow_forward
- Corgi fur color is controlled by two genes A and B. Gene A is the epistatic gene. Gene B determine coat color, red is dominant to brown fur. Suppose you breed two heterozygous Corgis, determine the following information: Phenotypes seen in their offspring, assume recessive epistasis.arrow_forwardwhen a red and white carnation are crossed, pink carnations result. This is an example of: A. classic dominance B. incomplete dominance C.  co-dominance D.  multiple allelesarrow_forwardLabrador retrievers’ fur color is controlled by two alleles, E and B. Any dog with the ee__ genotype develops into a yellow lab, while B_E_ dogs become black labs and bbE_ dogs become chocolate labs. This is an example of _____. a. epistasis b. codominance c. incomplete dominance d. linkagearrow_forward
- This illustration shows the F2 phenotypes from a monohybrid cross in snapdragons. What type of inheritance produces such an outcome? incomplete dominance multiple alleles continuous variation complete dominance epistasisarrow_forwardIf a pure- breeding wired hair terrier (WW) is crossed with a pure breeding smooth hair terrier (we) and puppy with wavy hair produced, the simplest explanation is _____ 1 - mutation has occurred 2- hair texture is an X linked trait 3- codominance 4- hair texture is lethal trait 5- incomplete dominancearrow_forwardIn humans brown eye color is dominant to blue eye color. Suppose that your mother is homozygous and your father is heterozygous and you have brown eyes. If you have a child with blue eyes, what are the possible genotypes of both of your parents? Group of answer choices Mother bb; Father bb Mother BB; Father BB Mother BB or bb; Father Bb Mother Bb ; Father Bbarrow_forward
- The American Curl is a breed of cat that has curly ears. The allele for the curly ears is dominant (E). Suppose a cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype. Fill out a Punnett Square and answer the following questions. What is the phenotypic ratio of this punnett square? If this cross produces six kittens, how many of them will have curly ears? ________arrow_forwardWhich of the following represents an organism that is homozygous dominant for a trait? rr Rr RR rRarrow_forwardA couple both with blue eyes have a kid with brown eyes. In this case, the eye color is determined by the amount of melanin produced. Brown eyes have more melanin while blue eyes have much less. Which of the following is the mostly likely explanation for this phenomenon? A. Incomplete dominance B. Allelic series C. Complementation D. All of the abovearrow_forward
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