Thursday
April 17, 2014

Homework Help: need help with these two, please

Posted by stew on Monday, September 24, 2007 at 8:22pm.

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

Question 2:
Assume that a cross is made beyween 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?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

genetics - 1. The genes for mohogany eyes and ebony body are approximately 25 ...
genetics - need help with these genetics problems. please help with what you can...
genetics - 3. Assume that there are 12 map units between two loci in the mouse ...
can anyone tell me if im right if not, help me?? - 3. Assume that there are 12 ...
Biology - You are studying a large population of claims of which 396 are pink (t...
genetics - you have performed a genetic cross, and in the final results, you get...
Biology - A trait whose expression is affected by the presence of sex hormones ...
Genetics - A male with singed bristles (sn) appeared in a culture of Drosophila...
Genetics/biology Advice - Can anyone comment as to wether this solution is ...
math - A map indicates that two cities are 160 miles apart. The scale of the map...

Search
Members