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Multiple Choice
How many unique gametes can be produced by an individual with the genotype aabbcc?
A
6
B
1
C
2
D
3
Verified step by step guidance
1
Identify the genotype given: aabbcc. This means the individual is homozygous recessive for all three gene pairs (aa, bb, cc).
Recall that gametes receive one allele from each gene pair. Since the individual is homozygous for each gene, only one type of allele can be passed on per gene.
For each gene pair, determine the number of different alleles that can be contributed to the gametes. Here, for 'aa' only 'a' can be passed, for 'bb' only 'b', and for 'cc' only 'c'.
Calculate the total number of unique gametes by multiplying the number of allele options for each gene: $1 \times 1 \times 1$.
Conclude that the number of unique gametes produced is the product from the previous step, which reflects the limited genetic variation due to homozygosity.