Question

You mate two Fi flies and observe the following results of the F2 generation. Mal Tan body Male. Wid Type Mae Tan body Female: Wild Type Female: Tan body 0 25 0 254 0 2400 Total 120 is. Describe the phenotypes and ratios obtained in the F generation. What does this result tell you about the sex chromosome location of the tan body allele? You perform a second experiment by crossing a female fly with the vestigial wing size mutation and a white-eyed male. You record the following F, generation data in your laboratory Cross #3 Pves Mae: whe eyea Phenotype Male: Wid Type Female: Wid Type Number Prepertion 05154 049菊 Total1199 From the F, generation, you chose a male and female to cross to produce the following F2 offspring. Phenotpe Female: Wild Type Male: Whie eyes Male: Wild Type Female: Vestigial wings Male: Vesigial wings Male: Whie eyes Vessigial wings Number Proporton 0 3084 0.1935 0.1837 0.1220 0.0098 0 0018 208 139 Total1132 16. Describe the phenotypes and ratios obtained in the F2 generation. What does this result tell you about the sex chromosome location of the white eye allele?

Answer 1

1. Phenotypic ratio is: 2:1 (aristapedia antennae : wild type). You have to do 815/408 = 1.9975 = 2

The phenotypes are wild type and aristapedia antennae.