LIFE SCIENCE

Detailed explanation-1: -A recessive allele is the allele that is usually overshadowed by the dominant allele. This means that this allele is less likely to be expressed. Recessive alleles are usually represented by lowercase letters and require two copies to be expressed.

Detailed explanation-2: -A dominant allele determines the expression of a specific trait even in the presence of other alleles. One dominant allele is enough for a dominant trait to be observed in the organism. For example, since brown eyes are dominant over blue eyes, an individual needs only one allele for brown eyes for it to be manifested.