How many genetically different types of gamete are produced by an individual with the genotype AaBb, assuming independent assortment?
Correct answer: C. 4
- 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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About Mendel's Laws of Inheritance
Mendelian inheritance explains how alleles separate into gametes and assort during reproduction, producing predictable genotype and phenotype ratios. Questions cover dominance, recessiveness, homozygous and heterozygous conditions, the laws of segregation and independent assortment, monohybrid and dihybrid crosses, test crosses and the limits caused by linked genes.
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