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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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mike13m mike13m
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12 years ago
recessive (aabb), how many different phenotypes will there be in their offspring. List the specific amounts. If you can put a Punnet Square in that would be great!
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#1
12 years ago
The possible gamete genotypes of the heterozygote are: AB, Ab, aB, ab
The possible gamete genotypes of the homozygous recessive are: ab

If these are crossed (I have done a punnet square - see the link below) you end up with: 25% AaBb, 25% Aabb, 25% aaBb, 25% aabb

Which means there are four different offspring phenotypes, with equal amounts of each.

Punnet square: http://i90.photobucket.com/albums/k270/hannahsutlow/Punnet.jpg

Hope this helps!
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