Questions
AGRI10051_2025_SM2 Exam: Genetics for Agriculture (AGRI10051_2025_SM2)- Requires Respondus LockDown Browser
Single choice
In a dihybrid cross (Aa;Bb x Aa;Bb) involving two independently assorting genes, what proportion of offspring would be heterozygote at both loci?
Options
A.50%
B.25%
C.75%
D.6.25%
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Step-by-Step Analysis
When considering a dihybrid cross AaBb x AaBb, we treat the two gene loci as independently assorting.
First, focus on one gene: Aa x Aa yields offspring genotypes with probabilities AA 1/4, Aa 1/2, and aa 1/4. Therefore, the chance of being he......Login to view full explanationLog in for full answers
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