AP BIOLOGY

Detailed explanation-1: -An allele is one of two or more alternative forms of a gene, and they are found at the same place, or locus, on the chromosome. Heterozygous refers to having different alleles for a particular trait. If the two versions are different, you have a heterozygous genotype for that gene.

Detailed explanation-2: -The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).

Detailed explanation-3: -Heterozygous: Having two different alleles for a trait.

Detailed explanation-4: -Since organisms have two alleles for each trait, when the alleles of a pair are heterozygous (Yy), the dominant allele trait is expressed and the recessive allele trait is masked.

Detailed explanation-5: -If the two alleles are the same, the individual is homozygous for that allele. If the alleles are different, the individual is heterozygous.