Final answer:
The genotype not found in a gamete is a diploid representation like Aa or Bb. Gametes produced by an individual with AaBb genotype are AB, Ab, aB, and ab, as they receive one allele from each gene during meiosis.
Step-by-step explanation:
The genotype that is normally not found in a gamete is the one that has more than one allele for the same gene. For example, Aa and Bb represent heterozygous conditions, where both dominant and recessive alleles for a gene are present. However, gametes would contain only one allele per gene due to meiosis, where chromosomes are halved and each gamete ends up with a single allele for each gene.
Considering an individual with the genotype AaBb, the types of gametes that can be produced are: AB, Ab, aB, and ab. Each gamete gets one allele from each gene, reflecting the law of independent assortment. Gametes are always haploid, thus genotypes such as Aa or Bb cannot be found within them because these are diploid representations.