Answer :

In genetics, the term 'homozygous dominant' refers to an organism that has two copies of the dominant allele for a particular trait. In the context of widow's peak, which is a V-shaped point in the hairline in the center of the forehead, the trait is determined by the gene symbolized by 'W'.

For widow's peak:

  1. 'W' represents the dominant allele for the presence of a widow's peak.
  2. 'w' represents the recessive allele for the absence of a widow's peak.

When an individual is homozygous dominant, their genotype consists of two dominant alleles. Therefore, the genotype looks like 'WW'. This means the individual has inherited the dominant allele from both parents, resulting in the expression of the widow's peak trait.

To break it down visually:

  • WW: Homozygous dominant - The individual has a widow's peak.
  • Ww: Heterozygous - The individual also has a widow's peak, as the dominant allele 'W' masks the recessive 'w'.
  • ww: Homozygous recessive - The individual does not have a widow's peak.

In summary, for the trait of widow's peak, a homozygous dominant genotype is 'WW', leading to the presence of a widow's peak.

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