Which genotype indicates that an individual is heterozygous for two traits?

The genotype that indicates an individual is heterozygous for two traits is represented by two different alleles for each trait. In this case, “AaBb” illustrates this concept clearly.

The first part of the genotype, "Aa," indicates that the individual has one dominant allele (A) and one recessive allele (a) for the first trait, making it heterozygous for that trait. The second part, "Bb," shows that this individual also has one dominant allele (B) and one recessive allele (b) for the second trait, again indicating heterozygosity for that trait.

As a result, "AaBb" reflects heterozygosity across two traits simultaneously, which is essential for understanding concepts like genotype expression and trait inheritance in biology.