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Answer:
a) wY
b) Y
c) w+
d) w+Y
e) w+Y
f) Y
g) w
h) wY
Explanation:
In the first half of the reciprocal cross, the we can see that the male gametes are w and blank (b). Since we know the male fly has one Y chromosome, we know that b must be Y, and that a must therefore be wY
We can see the female is homozygous w+w+, meaning her gametes are all w+, meaning c must be w+. The male in d will inherit the w+ from the mother and Y from the father, so must be w+Y
In the second half, the male is red, and we can see he carried the w+ allele. This means his other allele and potential gamete (f) must be Y, and his genotype (e) must be w+Y.
The female is homozygous ww, meaning all her gametes (g) will be w. The genotype of the male in h must be wY, as he will inherit a Y from his father and a w from his mother.
