The fact that a trait like height in humans varies over a wide range of values is due to
A) penetrance.
B) expressivity.
C) multiple alleles and the environmental influences on the expression of these genes.
D) epistasis.
E) discrete and qualitative genomic variation.

Question

Quizplus · Accepted Answer

Height in humans is a polygenic trait, which means it is influenced by multiple genes. Additionally, these genes have multiple alleles, both dominant and recessive, which can combine in various ways to produce a wide range of heights. Furthermore, environmental influences such as nutrition can impact the expression of these genes, leading to further variability in height. The other options (penetrance, expressivity, epistasis, and discrete genomic variation) do not fully explain the variability in height seen in humans.

The Fact That a Trait Like Height in Humans Varies