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26. Analyze the results of a cross between two organisms that are both heterozygous for two different genes (AaBb). Use a Punnett square to evaluate the possible genotypes. (1) List all the
genotypes from your Punnett Square in the answer space. (2) Determine how many phenotypes can be produced in the offspring. (3) Determine the probability of producing offspring with the aabb genotype. (3 points)
So our potential offspring genotypes are AABB, AABb, AAbb, AaBB, AaBb, Aabb, aaBB, aaBb, aabb. [ Since A and B dominate a and b, respectively, we need to identify the groups of genotypes that correspond to common phenotypes: * AABB, AABb, AaBB, AaBb * AAbb, Aabb * aaBB, aaBb * aabb The probability of producing offspring with aabb is 1/16, since it appears only once in our Punnett square out of
the 16 possible combinations. ]
Expert answered|jher000|Points 7961|
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Asked 1/4/2013 11:04:38 AM
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