Suppose two aabbcc individuals are mated. assuming that the genes are not linked, what fraction of the offspring are expected to be homozygous recessive for the three traits? a) 1/4b) 1/8c) 1/16d) 1/64

D. 1/64

Explanation:

When we say homozygous recessive, you are looking for a pair of alleles that are both in lower case. This means that the recessive trait will be shown phenotypically. So the genotype that you are looking for in the Punnet would be:

aabbcc

Because it says reecssive for all three traits. To get the ratio, all you have to do is count how many times the combination occurs in the Punnet out of the total number of outcomes.

Attached is a Punnet for this scenario.

As you can see it only occurs once out of the 64 possible combinations.

So the answer would be 1/64.

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