Question

7.6. explain how an individuals phenotype may be determined by multiple genes that interact with one another and with the environment. human height shows enormous range and variability. there is evidence that although human height is controlled by many different genes, exposure to malnutrition or chemical contaminants like lead in early childhood can limit a persons adult height. which of the following influences contribute to the range of heights in humans? epistasis codominance polygenic inheritance environmental effects

Explanation:

Epistasis is the interaction between non - allelic genes where one gene masks or modifies the expression of another. Polygenic inheritance means that a trait is controlled by multiple genes. Environmental effects such as nutrition and exposure to contaminants can influence phenotype. Codominance is when two alleles are both fully expressed in a heterozygote, which is not relevant here. Since human height is controlled by many genes (polygenic inheritance) and affected by environmental factors like nutrition and contaminants, and gene - gene interactions (epistasis) can also play a role in trait expression.

Answer:

Applies: epistasis
Applies: polygenic inheritance
Applies: environmental effects
Does not apply: codominance