AP BIOLOGY

HEREDITY

MULTIPLE ALLELES

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which of the following inheritance patterns explains how a particular version of a regulatory gene can activate or deactivate a gene that controls a particular trait?

A	codominance
B	pleiotropy
C	epistasis
D	incomplete dominance

Explanation:

Detailed explanation-1: -Answer and Explanation: Polygenic inheritance refers to the condition where a single trait (such as height, skin colour or weight) is controlled by the additive effect of two or more genes.

Detailed explanation-2: -Epistasis is a circumstance where the expression of one gene is modified (e.g., masked, inhibited or suppressed) by the expression of one or more other genes.

Detailed explanation-3: -Definition. A polygenic trait is a characteristic, such as height or skin color, that is influenced by two or more genes. Because multiple genes are involved, polygenic traits do not follow the patterns of Mendelian inheritance. Many polygenic traits are also influenced by the environment and are called multifactorial.

Detailed explanation-4: -Epistasis describes how gene interactions can affect phenotypes. Did you know that genes can mask each other’s presence or combine to produce an entirely new trait?

There is 1 question to complete.