1. In Drosophila again, a red-eyed heterozygous female is mated with a red-eyed male. A) What are...

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Biology

1. In Drosophila again, a red-eyed heterozygous femaleis mated with a red-eyed male.
A) What are the phenotypes of their male offspring?
B) What is the expected ratio of those phenotypes (in theirsons)?
2. A man and woman plan to have children. The woman is ahemophiliac (she suffers from hemophilia, which is an X-linkeddisorder), but the man is not a hemophiliac.
A) What are the chances that their sons will behemophiliacs?
B) What are the chances that their daughters will behemophiliacs?
C) What are the chances that their daughters will be carriers ofhemophilia?
3. A married woman gives birth to a color-blind daughter. Sheand her husband have normal color vision. The husband happens to bea genetics student. Despite the fact that individuals with colorblindness live perfectly normal lives, he is very upset bythis revelation. Why? Explain your reasoning.

Answer & Explanation Solved by verified expert

3.6 Ratings (586 Votes)

Ans1 A Gene of eye colour lies on X chromosome If female if heterozygous it will have RR genotype and male will have genotype RY Here R represents the wild type red eye R represents white eye and Y represents Y chromosome Now Let we cross the parents Male Parent Female Parent R Y R RR Red eyed female RY Red eyed male R RR Red eyed female RY White eyed male Hence male See Answer

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