Question

match each type of complex inheritance to its description.
a single gene controls multiple traits.
not an example of complex inheritance
multiple genes contribute to the expression of one trait.
the alleles of one gene control the expression of a second gene.
polygenic inheritance
pleiotropy
codominance
epistasis

Explanation:

• Pleiotropy: When a single gene controls multiple traits. For example, in some genetic disorders, one gene mutation can lead to multiple physical and physiological changes.
• Codominance: It is not an example of complex inheritance in the context of the given descriptions. Codominance is a type of inheritance where both alleles in a heterozygote are fully expressed.
• Polygenic inheritance: Occurs when multiple genes contribute to the expression of one trait. Traits like human height and skin color are examples of polygenic inheritance.
• Epistasis: Happens when the alleles of one gene control the expression of a second gene. For instance, in labrador retriever coat color, one gene can mask the expression of another gene related to color.

Answer:

• A single gene controls multiple traits: pleiotropy
• not an example of complex inheritance: codominance
• Multiple genes contribute to the expression of one trait: polygenic inheritance
• The alleles of one gene control the expression of a second gene: epistasis