The Distinction Between Multifactorial and Polygenic Traits Is That

question 19

Multiple Choice

The distinction between multifactorial and polygenic traits is that

• A) polygenic traits are caused by more than one gene, and multifactorial traits are caused by one or more genes as well as environmental influences.
• B) multifactorial traits are not genetic and polygenic traits are.
• C) the genetic component can be determined for polygenic traits but not for multifactorial traits.
• D) polygenic traits are caused by more than one gene and multifactorial traits are caused by only one gene.
• E) the phenotype of a multifactorial trait cannot change, and that of a polygenic trait can.

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Definitions:

Ovaries

Female reproductive organs that produce ova (eggs) and secrete hormones such as estrogen and progesterone.

Calcitonin

A hormone produced by the thyroid gland that lowers blood calcium levels by inhibiting bone resorption.

Blood Calcium Levels

The concentration of calcium ions in the blood, crucial for bone health, nerve function, and muscle contraction.

Thyroid Hormones

Thyroid hormones, including thyroxine (T4) and triiodothyronine (T3), are produced by the thyroid gland and are critical for regulating metabolism, growth, and development.