Biology Asked by hhghh on July 27, 2021
When given that the parent generation’s genotypes are linked traits, how do you determine the genotypes of the F1 generation when no recombination has occurred. For example, given the parents BbNn and bbnn what would be the expected genotypes of the F1 generation to be?
My current understanding is to follow Meiosis and separate the homologous pairs into Bb Nn and bb nn. Then, because no crossover is occurring, my guess would be that the daughter genotypes are BbNn and bbnn. However, in reality, the answer should be Bbnn and bbNn. Am I doing something wrong? How would I draw the related chromosomes?
My current understanding is to follow Meiosis and separate the homologous pairs into Bb Nn and bb nn.
No. If the alleles are linked, then you either have one chromosome with BN, and the other with bn, or you have one chromosome with Bn, and the other with bN. From this information alone, you can't know which. Your answer assumes the first situation is how the alleles are linked, the given answer assumes the second.
Answered by swbarnes2 on July 27, 2021
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