part A (A.1)Drosophila larvae were exposed to a possible mutagen (chemcial x). T

Question

part A

(A.1)Drosophila larvae were exposed to a possible mutagen (chemcial x). The male flies that developed from these larvae were then crossed with unexposed females. From a total of 86,450 offspring from such crosses, 120 mutant offspring were found. What is the mutation rate observed in the exposed flies?

2.8 x 10^-2

1.4 x 10^-4

(A.2) In fruit flies with the curly wing mutation, the wings are curly at temperatures above 16 degrees Celsius but are the wild-type straight shape at cooler temperatures. This type of mutation is called:

Explanation / Answer

What is the mutation rate observed in the exposed flies?

C) 1.4 x 10 ^-3

120 / 86450 = 0.001388 which is around 0.0014

That means 1.4 x 10 ^-3

In fruit flies with the curly wing mutation, the wings are curly at temperatures above 16 degrees Celsius but are the wild-type straight shape at cooler temperatures. This type of mutation is called:

C) Conditional

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