PATHOLOGY

Detailed explanation-1: -If there are two different versions, it is a heterozygous genotype for that particular gene. Another example is heterozygous for the colour of hair, which corresponds to having one allele for brown hair and the other alleles for red hair.

Detailed explanation-2: -Individuals carrying two identical alleles (RR or rr) are known as homozygous. While individual organisms bearing different alleles (Rr) are known as heterozygous.

Detailed explanation-3: -The combination of alleles carried by an individual is its genotype. For example, let’s say R (read “big R”) is the dominant round allele, and r (read “little r”) is the recessive wrinkled allele. True-breeding round peas would have two copies of the R allele and a genotype of RR.