Different versions of the same gene, called alleles, determine how often a trait appears in a population. Children inherit one allele from each parent. One allele is always dominant and appears more often, while one is recessive and only appears if the dominant allele is not present.
Each allele can appear in one of three combinations: two dominant alleles, one dominant and one recessive allele, or two recessive alleles. In the first two cases, the phenotype associated with the dominant allele is present in the offspring, since the dominant allele overrides the recessive one at the genetic level. It is only when two recessive alleles are present that a recessive phenotype appears.Learn More
An ancestral trait is a genetic similarity passed down to subsequent generations, such as eye and skin color. Male pattern baldness and flushed cheeks are also considered ancestral traits.Full Answer >
Freckles are a dominant trait. Freckles come from genes and the sun and are most often seen on people with light-colored skin.Full Answer >
A dominant trait, or allele, is a trait in which only one gene copy is needed in order for it to be expressed. The terms dominant and recessive traits describe a simple inheritance pattern that reproductive organisms follow.Full Answer >
An example of a genotype is an organism's blood type, while an example of a phenotype is its height. Height can be affected by an organism's poor diet while developing or growing up.Full Answer >