NEET BIOLOGY

Detailed explanation-1: -The recessive trait is hidden in the heterozygous individual (Dd) if the other allele is inherited in a dominant fashion, and so this person is a called a “carrier” of the recessive allele, but does not manifest the disease or trait.

Detailed explanation-2: -Difference between homozygous and heterozygous In a heterozygous genotype, the dominant allele overrules the recessive one. Therefore, the dominant trait will be expressed. The recessive trait won’t show, but you’re still a carrier.

Detailed explanation-3: -Recessive alleles are only expressed if both of a person’s alleles are recessive. If a person has one dominant allele and one recessive, he is called a carrier. This is because he expresses the dominant trait, but “carries” the recessive trait. An example of this is albinism.

Detailed explanation-4: -The dominance or recessivity associated with a particular allele is the result of masking, by which a dominant phenotype hides a recessive phenotype. By this logic, in heterozygous offspring only the dominant phenotype will be apparent.

Detailed explanation-5: -A person who is a heterozygous for a recessive genetic disorder is called a carrier.