NEET BIOLOGY

Detailed explanation-1: -Final answer: A dominant allele expresses itself in both homozygous and heterozygous condition.

Detailed explanation-2: -Dominant alleles show their effect even if the individual only has one copy of the allele (also known as being heterozygous?). For example, the allele for brown eyes is dominant, therefore you only need one copy of the ‘brown eye’ allele to have brown eyes (although, with two copies you will still have brown eyes).

Detailed explanation-3: -Allele refers to variants of the same gene that occur on the same chromosome. An allele is said to be dominant as they override or mask the effect of other variants available for the same gene. If both the alleles are the same, they are said to be homozygous and the character is expressed.

Detailed explanation-4: -Dominant alleles are always expressed if present in the genotype. This can occur either with two dominant alleles (homozygous dominant) or one dominant allele and one recessive allele (heterozygous).

Detailed explanation-5: -A dominant allele is an allele that is expressed in the phenotype of an individual even when present as a single copy. This allele is not affected nor masked by the presence of the other allele.