Reduced penetrance and variable expressivity are factors that influence the effects of particular genetic changes. These factors usually affect disorders that have an autosomal dominant pattern of inheritance, although they are occasionally seen in disorders with an autosomal recessive inheritance pattern.enetrance refers to the proportion of people with a particular genetic change (such as a mutation in a specific gene) who exhibit signs and symptoms of a genetic disorder. If some people with the mutation do not develop features of the disorder, the condition is said to have reduced (or incomplete) penetrance.
Although men have more muscle mass than women, both sexes reach their physical peak as young adults or anywhere from their late 20's to early 30's, according to âHuman Development: A Life-Span Viewâ by Robert Kail and John Cavanaugh.
Unsurprisingly, the idea that men and women have specific, but different, sexual peaks is pretty outdated. Regardless of hormonal maturity or concentrations, both men and women reach their sexual peak when theyâre most comfortable with their own bodies and sexuality.ecause men supposedly peak at age 18, many young male adults are expected to be âexperiencedâ , which can create a culture of peer pressure for men to have sex before theyâre ready. For both men and women, buying into the idea of âsexual peaksâ is a waste of time, if not outright damaging.