How many genetically different types of gamete are produced by an individual with the genotype AaBb, assuming independent assortment?
- A. 2
- B. 3
- C. 4
- D. 8
Explanation
Each gene pair contributes two choices, so 2 times 2 gives four gamete types: AB, Ab, aB and ab. The rule is two to the power of the number of heterozygous pairs, which scales to dihybrids and beyond.
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