In cardinals, a dominant allele R is required for red feathers (r = colorless). In addition, the dominant allele I (of an unlinked gene. is an inhibitor of color (birds with an I allele are colorless; I overrides the effects of R). If a true breeding red cardinal mates with a colorless female (genotype = r/r; I/I): a) What would be the genotype of the F1 progeny? b) What would be the phenotype of the F1 progeny? c) If the F1 progeny are selfed, what is the expected colorless:red ratio among the progeny?

In cardinals, a dominant allele R is required for red feathers (r = colorless). In addition, the dominant allele I (of an unlinked gene. is an inhibitor of color (birds with an I allele are colorless; I overrides the effects of R). If a true breeding red cardinal mates with a colorless female (genotype = r/r; I/I): a) What would be the genotype of the F1 progeny? b) What would be the phenotype of the F1 progeny? c) If the F1 progeny are selfed, what is the expected colorless:red ratio among the progeny?

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Description: In cardinals, a dominant allele R is required for red feathers (r = colorless). In addition, the dominant allele I (of an unlinked gene. is an inhibitor of color (birds with an I allele are colorless; I overrides the effects of R).If a true breeding

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter11: The Basic Principles Of Heredity

Section: Chapter Questions

Problem 10TYU: A walnut comb rooster is mated to three hens. Hen A, which has a walnut comb, has offspring in the...

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The ABO blood groups in humans are expressed as the I A , I B , and i alleles. The I A allele encodes the A blood group antigen, I B encodes B, and i encodes O. Both A and B are dominant to O. If a heterozygous blood type A parent (I A i) and a heterozygous blood type B parent (I B i) mate, one quarter of their offspring are expected to have the AB blood type (I A I B ) in which both antigens are expressed equally. Therefore, ABO blood groups are an example of: a. multiple alleles and incomplete dominance b. codominance and incomplete dominance c. incomplete dominance only d. multiple alleles and codominance
Consider the following statement: ‘female, w+w flies have red eyes’. In this example: Group of answer choices 1) w+w is the genotype, and red eyes is the phenotype 2) female is the genotype, and red eyes is the phenotype 3) not enough information provided to determine genotype or phenotype 4) red eyes is the genotype, and w+w is the phenotype
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In swallowtail butterflies, let's pretend that the R gene codes for coloring on the forewing. The R1 allele, which codes for red color, is dominant to the R2 allele, which codes for white color. If R1 is a recessive lethal allele, what phenotypic ratio would you expect when crossing two swallowtails with red forewings? 1 red : 2 white 1 red : 3 white 3 red : 1 white there is not enough information given to answer this question 1 red : 1 white 2 red : 1 white
A walnut comb rooster is mated to three hens. Hen A, which has a walnut comb, has offspring in the ratio of 3 walnut to 1 rose. Hen B, which has a pea comb, has offspring in the ratio of 3 walnut to 3 pea to 1 rose to 1 single. Hen C, which has a walnut comb, has only walnut comb offspring. What are the genotypes of the rooster and the three hens?
A sex-influenced trait is dominant in bulls and causes horns. The same trait is recessive in cows and results in no horns. Fur color is not sex influenced, with black fur dominant to cream. A true breeding female with horns and black fur was crossed to a cream-colored male without horns. The F1 females were then crossed to hornless cream-colored males. The following results were obtained: Males: 30 hornless, black 68 hornless, cream-colored 74 horns, black 26 horns, cream-colored Females: 109 hornless, black 91 hornless, cream-colored 0 horns, black 0 horns, cream-colored Construct a chi square analysis to see if the genes are linked. If the genes are linked, compute the map distance between them.