Traits, also known as phenotypes, may include features such as eye color, hair color, immunity or susceptibility to certain diseases and facial features such as dimples and freckles.

Lastly, males and females are equally likely to receive a dominant allele and express the trait. A dominant trait is an inherited characteristic that appears in an offspring if it is contributed from a parent through a dominant allele. Dominantly inherited traits do not skip generations. Every affected individual must have an affected parent. A Punnett square can be used to determine all possible genotypic combinations in the parents.ДЄ pedigree that depicts a dominantly inherited trait has a few key distinctions. For example, if one parent is homozygous dominant (WW) and the other is homozygous recessive (ww), then all their offspring will be heterozygous (Ww) and possess a widowвЂ™s peak.В If both parents are heterozygous (Ww), there is a 75% chance that any one of their offspring will have a widowвЂ™s peak (see figure). Only ww individuals will have a straight hairline.В To determine the probability of inheritance of a widowвЂ™s peak (or any other dominant trait), the genotypes of the parents must be considered. An individual with a (WW) or (Ww) genotype will have a V-shaped peak at the hairline. Preview7 hours ago Identifying Simple Dominant and Recessive Traits in Pedigrees Introduction: A pedigree is a. Let (W) represent the dominant allele, and (w) represent the recessive allele. One example of a dominantly inherited trait is the presence of a widowвЂ™s peak (a V-shape) at theВ hairline. Offspring whose genotype is either AA or Aa will have the dominant trait expressed phenotypically, while aa individuals express the recessive trait. Since each parent provides one allele, the possible combinations are: AA, Aa, and aa.

A dominant allele is denoted by a capital letter (A versus a). A dominant allele will mask a recessive allele, if present. When a trait is dominant, only one allele is required for the trait to be observed.

Dominant traits definition