A few days ago
anyone good with genetics problems? the questions?
1. Given that loci A and B in Drosophila are sex-linked and 20 map units apart, what phenotypic frequencies would you expect in male and female offspring resulting from the following crosses? (Assume A and B are dominant to a and b, respectively).
A) AaBb (cis) female X ab/Y male
B) AaBb (trans) X ab/Y male
C) aabb female X AB/Y male
2. Assume that a cross is made between AaBb and aabb plants, and the offspring occur in the following numbers: 106 AaBb, 48 Aabb, 52 aaBb, 94 aabb. These results are consistent with which arrangement of genes?
I approached this question as a three-point mapping problem. I have tried it so many times with no luck and I am frustrated.
Top 1 Answers
A few days ago
Favorite Answer
man, i don’t remember anything about fruit flies. that was soooo long ago. but i bet i could find the answer in your textbook if i had a copy
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