Is a widow’s peak a phenotype?

Is a widow’s peak a genotype or phenotype?

The genotypes WW and Ww will produce a widow’s peak (the dominant phenotype) and the ww genotype will produce no widow’s peak (the recessive phenotype).

Is widow peak a phenotypic trait?

Definition. A widow’s peak is a distinct point in the hairline in the center of the forehead; there are varying degrees of the peak. Although it is commonly taught as an example of a dominant inherited trait, there are no scientific studies to support this.

What type of trait is a widow’s peak?

Traits due to recessive alleles are only observed when two recessive alleles are present. For example, the allele for widow’s peak is dominant and the allele for straight hairline is recessive.

Is Widow’s Peak homozygous dominant or heterozygous?

A widow’s peak is dominant over a straight hairline, so both WW and Ww people have widow’s peaks. a. For most genes, a heterozygous person is indistinguishable from a homozygous dominant. 10.

Is Widows Peak autosomal dominant?

Clinical Features. A pointed frontal hairline, popularly referred to as widow’s peak, may be inherited as an autosomal dominant (194000).

What is the phenotype of a male who is heterozygous for the widow’s peak?

A male heterozygous for widow’s peak marries a female without a widow’s peak. Widow’s peak is a dominant trait (H) not having a widow’s peak is recessive (h). What is the male’s phenotype? A male heterozygous for widow’s peak marries a female without a widow’s peak.

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Is the allele for widow’s peak dominant or recessive?

The gene that is not expressed (“weaker”) is said to be the recessive gene. The widow’s peak gene is dominant over the straight hairline gene; when they occur together a person will have a hairline with a widow’s peak.