The color of chickens is determined by interacting loci: AA or Aa give white, aaBB or aaBb give colored, and aabb produce white. Describe the epistatic interactions occurring between these two genes: A. aa is epistatic to B_, bb and bb are epistatic to A_,aa B. A_ is epistatic to B_,bb and bb is epistatic to A_,aa C. None of the above

The color of chickens is determined by interacting loci: AA or Aa give white, aaBB or aaBb give colored, and aabb produce white. Describe the epistatic interactions occurring between these two genes: A. aa is epistatic to B_, bb and bb are epistatic to A_,aa B. A_ is epistatic to B_,bb and bb is epistatic to A_,aa C. None of the above

Name: The color of chickens is determined by interacting loci: AA or Aa give
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Description: The color of chickens is determined by interacting loci: AA or Aa give white, aaBB or aaBb give colored, and aabb produce white. Describe the epistatic interactions occurring between these two genes:A. aa is epistatic to B_, bb and bb are epistatic t

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 12TYU: Genes A and B are 6 map units apart, and A and C are 4 map units apart. Which gene is in the middle...

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The color of chickens is determined by interacting loci: AA or Aa give white, aaBB or aaBb give colored, and aaBb produces white. Describe the epistatic interactions occurring between these two genes.
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In mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A allele. The homozygous AY AY genotype is lethal. Why is the AYAY homozygous condition lethal? The AY allele highly transcribes the merc gene which is lethal in a homozygous AYAY individual. None of the other answers are correct. The AY allele lacks an upstream merc gene which is required for normal embryonic development. The AY allele contains a null mutation in the A gene, which is required for normal embryonic development. The yellow pigment produced by A allele is required for survival.
2) In chickens, feather colour is determined by alleles at 2 loci. Chickens with the allele I have white feathers, whatever alleles they have at the other locus. Chickens with the genotype cc also have white feathers, although presence of the dominant allele C results in coloured feathers, so long as the I allele is absent. Write down all the possible genotypes that produce a) white chickens b) coloured chickens c) which is the epistatic gene? d) what type of epistasis is this?
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The white Leghorn breed of chickens is homozygous for the dominant allele C, which produces colored feathers. However, this breed is also homozygous for the dominant allele I of an independently assorting gene that inhibits coloration of the feathers. Consequently, Leghorn chickens have white feathers. The white Wyandotte breed of chickens has neither the allele for color nor the inhibitor of color; it is therefore genotypically cc ii. What are the F2 phenotypes and proportions expected from intercrossing the progeny of a white Leghorn hen and a white Wyandotte rooster?
In a poultry breed, chickens can have black, blue or white feathers. The different feather colors are determined by interactions between genes at two loci. One locus determines the type of pigment produced by the skin cells: a dominant allele B encodes black pigment, whereas a recessive allele b encodes blue pigment. Alleles at a second locus affect the deposition of the pigment onto the feathers. Allele E allows dark pigment (black or blue) to be deposited, whereas the homozygous recessive (ee) condition prevents the deposition of dark pigment, causing the feathers to be white. In each of the following 3 crosses give the genotypes and phenotypes of the parents and their offspring: a) Two black birds that are both heterozygous for traits B and E b) Two blue birds that produce 6 blue and 2 white chicks c) A black bird that is homozygous dominant for both traits and a white bird that is homozygous recessive for both traits
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