3.) In chickens, two genes control feather color—the R gene and the Q gene. The Rallele...
3.) In chickens, two genes control feather color—the R gene and the Q gene. The Rallele causes chickens to be red and the r allele causes chickens to be white. R is dominant to r. Likewise, Q codes for red and q codes for white. Q is dominant to q. If a chicken has just one dominant allele of either gene, it will be red.
How many red and white chickens would expect in a cross between two chickens that are heterozygous for both genes and have 100 offspring?
4.) In reality, when you count the 100 offspring, you discover that approximately 75 chickens are red and 25 chickens are white.
Do these numbers differ from your expectation above?
If so, explain in detail what caused the discrepancy and draw a Punnett square that could explain this result.
Homework Answers
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3.) In chickens, two genes control feather
color—the R gene and the Q gene. The Rallele...
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Question 3 1 pts The color of chickens is determined by gene B, such that BB=black,...
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The gene for feather color has two codominant alleles - one for black feathers (FB) and...
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In chickens, comb shape is determined by non-epistatic interactions between genes at two loci (R, r...
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Question 3 1 pts The color of chickens is determined by gene B, such that BB=black, Bb = gray, and bb = white. A second gene R controls comb shape, with dominant rose and recessive single comb. If a white single-combed chicken is mated with a gray chicken that is heterozygous for rose comb, what fraction of the offspring will be gray with rose comb? 1/4 9/16 1/8 O 3/8 1/16
The gene for feather color has two codominant alleles - one for black feathers (FB) and one for white feathers (FW). Heterozygous chickens (FF) have BOTH black and white feathers, 9) Cross a black chicken and an Erminette chicken. 10) Cross a white chicken and a black chicken
In sweet peas, two genes (genes A and B) control flower color. The dominant alleles of both genes produce enzymes that function in the biochemical pathway shown to convert colorless precursors to a purple pigment. The recessive alleles do not produce enzyme. Therefore, at least one dominant allele of both gene A and gene B are required for purple flowers. Answer the questions about this biochemical pathway. ΑΑ, Αα BB, Bb Enzyme A Enzyme B Colorless precursor 1 Colorless precursor...
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