NEET BIOLOGY

Detailed explanation-1: -A dominant trait will always be expressed in the offspring if the dominant allele is present, even if there is only one copy of it (heterozygous or dominant homozygous, Aa or AA).

Detailed explanation-2: -A dominant phenotype refers to a trait which is expressed in one of two conditions: the inheritance of two dominant alleles (homozygous dominant) or the inheritance of one dominant and one recessive allele (heterozygous dominant).

Detailed explanation-3: -Dominant traits and alleles. Dominant refers to the inheritance of traits that are typically passed vertically from parent to child where both the parent and the child are affected by the trait or disorder that is related to that gene.

Detailed explanation-4: -Dominant traits are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. Recessive traits are expressed only if both the connected alleles are recessive.

Detailed explanation-5: -So the dominant allele is always expressed, but it can differ in penetrance and is therefore not always as clearly expressed in the cell’s phenotype as you expect from a dominant allele.