Chapter 2, Problem 29P

In the fruit fly Drosophila melanogaster, the following genes and mutations are known:

Wing size: recessive allele for tiny wings t; dominant allele for normal wings T.

Eye shape: recessive allele for narrow eyes n; dominant allele for normal (oval) eyes N.

For each of the four following crosses, give the genotypes of each of the parents.

Male				Female
	Wings	Eyes		Wings	Eyes	Offspring
1	Tiny	Oval	X	Tiny	Oval	78 tiny wings, oval eyes
						24 tiny wings, narrow eyes
2	Normal	Narrow	X	Tiny	Oval	45 normal wings, oval eyes
						40 normal wings narrow eyes
						38 tiny wings, oval eyes
						44 tiny wings narrow eyes
3	Normal	Narrow	X	Normal	Oval	35normal wings oval eyes
						29 normal wings, narrow eyes
						10 tiny wings, oval eyes
						11 tiny wings, narrow eyes
4	Normal	Narrow	X	Normal	Oval	62 normal wings, oval eyes
						19 tiny wings, oval eyes