LIFE SCIENCE

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 allele is an allele that is always expressed in the phenotype if present in the genotype. A dominant allele “dominates” over the recessive allele. In our example, the allele coding for blood group A is the dominant allele.

Detailed explanation-3: -An allele that is dominant is always shown to be a capital letter and a recessive allele is shown to be the lowercase version of that same letter. In a simple dominant/recessive relationship, any organism that receives a dominant allele will only visibly express that allele.