Genetics: Analysis and Principles 5th Edition by Robert Brooker

تمرين 43

Parental generation: True-breeding flies with red eyes and long wings were crossed to flies with white eyes and miniature wings. All F 1 offspring had red eyes and long wings.The F 1 female flies were then crossed to males with white eyes and miniature wings. The following results were obtained for the F 2 generation:
129 red eyes, long wings
133 white eyes, miniature wings
71 red eyes, miniature wings
67 white eyes, long wings
The recombinant offspring of the F 2 generation were produced by crossing over that occurred
A) during spermatogenesis in the parental generation males
B) during oogenesis in the parental generation females
C) during spermatogenesis in the F 1 males
D) during oogenesis in the F 1 females.