Question

I just need help with part 5 e. I dont know how to set up a punnett square that includes sex chromosomes with wing length as well as eye color.

5. A male fruit fly with red eyes and long wings is mated to a female with brown eyes and short wings. All of the F1 males have red eyes and short wings, and all of the F1 females have red eyes and long wings. The F1s are intercrossed to produce the F2 generation.

a. Which eye color phenotype is recessive? (1 pt)

b. Is red vs. brown eye color an autosomal, or a sex-linked trait? How can you tell? (1 pt)

c. Which wing length phenotype is recessive? (1 pt)

d. Is long vs. short wing length an autosomal, or a sex-linked trait? How can you tell? (1 pt)

e. Predict the gentoypes and phenotypes of the F2 generation. Use the symbols R and r for eye color, and W and w for wing length. Indicate the sex chromosomes (X and Y) where needed. Also indicate which flies are males, and which are females. (2 pt)

Answer 1

Q :-5] e) Given; All of the F1 males have red eyes & short wings & all of F1 females have red eyes & tong wings. As we know, Eye color in drosophilla is a sex-linked trait & Wing length is a autosomal trait bo we can write genotype of male & female progeny obtained from F1 as, F1 Male FĘ Female XR XO Wo XRyow cohere, R stands for red color ceye) < dominont) r = brown eye color W = dominant allele for long coings w = recessive allele for short coings. If we made cross between them, XkYww X XRxo Was o>

xxww RR X X Wco RR ХХоо X xww 9 X Y ww w Wew Yow XYWw | xYwo 07 Q = Female و له M = جي F2 generation, Genotype phenotype 6JXR_Wcol = Red eye long wings 6.1XR_cowl - Red eye short wings 2,8°YWwl = Boucun eye long wings 2 X 9Ywowo - Brocon eye short wings