NEET BIOLOGY

Detailed explanation-1: -Of these three genotypes, only bb, the homozygous recessive genotype, will produce a phenotype of blue eyes. The heterozygous genotype and the homozygous dominant genotype both will produce brown eyes, though only the heterozygous genotype can pass on the gene for blue eyes.

Detailed explanation-2: -Eye color, hair color, and blood type are all phenotypes. You may have a brown-eye phenotype, and your eyes will, therefore, be brown; a brown-hair phenotype and your hair will be brown, or an A blood type phenotype and your blood type will be A.

Detailed explanation-3: -Although eye color is usually modeled as a simple, Mendelian trait, further research and observation has indicated that eye color does not follow the classical paths of inheritance. Eye color phenotypes demonstrate both epistasis and incomplete dominance.

Detailed explanation-4: -If a person has a non-functioning OCA2 gene, they will always have blue eyes, because the HERC2 gene can’t make the broken OCA2 gene work. Likewise, if a person has a HERC2 gene which doesn’t work, the OCA2 gene will “underachieve, ” failing to produce enough pigment to make brown eyes, resulting in blue eyes.

Detailed explanation-5: -It includes both your visible traits (like hair or eye color) and your measurable traits (like height or weight). Phenotype also refers to characteristics related to your development and behavior, like elements of your personality. The set of genes you carry (known as your genotype) is what determines your phenotype.