When flies having a gray body and normal wings were crossed with flies having a black body and vestigial wings, the F2 generation showed a phenotypic ratio of 3:1, and not 9:3:3:1.

Which of the following could be a correct explanation for this ratio?

A- Genes for body and wing size were on the same chromosome and inherited together
B- Genes for body and wing size assort independently
C- Genes for body color and wing size are inherited separately from each parent
please help me so i can understand

Question

When flies having a gray body and normal wings were crossed with flies having a black body and vestigial wings, the F2 generation showed a phenotypic ratio of 3:1, and not 9:3:3:1.

Which of the following could be a correct explanation for this ratio?

A- Genes for body and wing size were on the same chromosome and inherited together
B- Genes for body and wing size assort independently 
C- Genes for body color and wing size are inherited separately from each parent
please help me so i can understand

anonymous · Answer

Which part are you unsure of?

anonymous · Answer

like i don't understand the question

anonymous · Answer

Ok, it's asking you which of the possible answer choices explains the scenario in the question. You will need to be comfortable with punnett squares in order to answer this.

anonymous · Answer

i did that and i got the B as my answer

anonymous · Answer

B is a good choice! Since it tells you that it's NOT a 9:3:3:1 ratio then you know that the traits for wing type and body color are not "connected", for lack of a better term otherwise you would have to set up a dyhybrid cross with 16 squares

anonymous · Answer

I TRIED B AND IT GOT ME WRONG!!!!!!!!!!

anonymous · Answer

it was A