NEET BIOLOGY

Detailed explanation-1: -Recessive alleles are denoted by a lowercase letter (a versus A). Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait.

Detailed explanation-2: -genotype = the genes of an organism; for one specific trait we use two letters to represent the genotype. A capital letter represents the dominant form of a gene (allele), and a lowercase letter is the abbreviation for the recessive form of the gene (allele).

Detailed explanation-3: -Dominant alleles are represented by capital letters and recessive alleles are represented by lowercase letters. For example, blue eyes are a recessive trait and brown eyes are a dominant trait.

Detailed explanation-4: -Recessive alleles are always represented by lowercase letters. In order for an organism to express a recessive allele, it must have received a recessive allele from both of its parents.

Detailed explanation-5: -Heredity. In a Punnett square, capital letters represent dominant alleles. Lower case letters represent recessive alleles.