Question

If the allele for dark-colored hair is dominant over the allele for light-colored hair. Select the correct statement which is least likely to occur.

• A. A light-haired couple produces a baby with dark hair
• B. A dark-haired couple produces a baby with light hair
• C. A light-haired woman and a dark-haired man produce a light-haired baby
• D. A dark-haired woman and a light-haired man produce a light-haired baby
• E. A dark-haired woman and a light-haired man produce a dark-haired baby

Answer 1

The correct option is A A light-haired couple produces a baby with dark hair

Dark-colored hair is dominant while light-colored hair is recessive. So, as per Mendel's dominant law, the allele which is dominant will be expressed even it is heterozygous. While recessive will be expressed only when the alleles are homozygous. So, a light-haired couple can produce a baby with light hair and incapable to produce a baby with dark hair. Thus, the correct answer is option A.