There are four paris of chromosomes in Drosophila: the sexchromosomes (XX in females and XY in males) and three pairs ofautosomes. You are studying a new mutant strain with greeneyes. You want to know if green eye color is a dominantmutation and on which chromosome the green eye locus can befound. When you cross a pure-breeding female green-eyed flywith vestigial wings, and spineless bristles to a male fly withwildtype eye color, wings, and bristles, the F1 progeny all arewildtype. An F1 male is backcrossed to a triple mutantfemale, producing the following progeny:
wildtype eyes, wings, and bristles ----- 73 females, 70 males
wildtype eyes and bristles, vestigial ----- 84 females, 78males
wildtype wings, green eyes, spineless ----- 53 females, 44males
green eyes, spineless, vestigial ----- 63 females, 58 males
a. Is the mutation dominant or recessive? Explain.
I would say the green eye mutation is recessive because all the F1progeny yielded wildtype.
b. Since you know that the locus for vestigial wings is onchromosome 2 and the locus for spineless bristles is on chromosome3, what chromosome carries the locus for green eyes? Showwork including the step by step reasoning used to arrive to youranswer.