Determine mapping distance
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An organism of genotype AaBb is testcrossed. 1000 offspring are counted and the numbers in the four genotypic categories are as follows:
AaBb 450
Aabb 42
aaBb 38
aabb 470
1.What can you say about these genes and what is the distance in map unit between 2 genes?
2.Rf between 2 genes is 0.5. What are 2 likely locations of these genes?
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Solution Summary
Short paragraphs answering two questions about mapping distance. Web references provided.
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1. In a test-cross AaBb x aabb the expected offspring are as follows:
AB Ab aB ab
ab AaBb Aabb aaBb aabb
ab AaBb Aabb aaBb aabb
1/4 AaBb
1/4 Aabb
1/4 aaBb
1/4 aabb
However, the observed ...
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