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There is X-linked mutations in flies in this example. You need to determine the inheritence pattern...

There is X-linked mutations in flies in this example. You need to determine the inheritence pattern of a mutant that causes hairy body. You mate hairy body males with females that are true breeders for normal bodies. All the offspring (F1) have normal bodies.

a.) The hairy body is dominant or recessive?

b.) What symbol will you use to represent the hairy allele?

c.) What symbol will you use to represent the normal allele?

d.) Determine the genotypes of the F1 offspring using a punnet square.

e.) Next you mate the F1 to produce F2. Use a punnet square to demonstrate this cross. Write out the genotypic and phenotypic ratios of the f2 generation.

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Answer #1

The 'Y' is mentioned as it is because the linkage is X linked

In the phenotypic ratio (F2 Generation) one male is hairy and one is normal and both the females are also normal.

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