Two pure-breeding parents produced a heterozygous female offspring (AaBb) that was then testcrossed with an aabb male. The offspring produced from the testcross included 50 AaBb, 450 Aabb, 450 aaBb, 50 aabb individuals.  Describe how you can tell if these two genes are linked or unlinked (What ratio would you expect to see from the testcross if they were not linked?).   What were the genotypes of the original parents that produced the heterozygous female?  What is the genetic map distance between the two genes?

Biology (MindTap Course List)
11th Edition
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Chapter11: The Basic Principles Of Heredity
Section: Chapter Questions
Problem 11TYU: Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were...
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Two pure-breeding parents produced a heterozygous female offspring (AaBb) that was then testcrossed with an aabb male. The offspring produced from the testcross included 50 AaBb, 450 Aabb, 450 aaBb, 50 aabb individuals.  Describe how you can tell if these two genes are linked or unlinked (What ratio would you expect to see from the testcross if they were not linked?).   What were the genotypes of the original parents that produced the heterozygous female?  What is the genetic map distance between the two genes? 

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