What Is the Apparent Purpose for X Inactivation in Humans

question 17

Multiple Choice

What is the apparent purpose for X inactivation in humans and other mammals?

• A) It allows for the levels of expression of genes on the X chromosome to be similar in males and females.
• B) It allows for the levels of expression of genes on the autosomes to be similar to the levels of genes on the X chromosome.
• C) It suppresses the expression of genes on the Y chromosome in males.
• D) It reduces the amount of nondisjunction during meiosis in females.
• E) It enhances the level of pairing between the two X chromosomes during meiosis in females.

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Definitions:

Constant Rate

A fixed percentage rate applied over a certain period which does not change.

Dividend Per Share

The amount of dividends paid to shareholders per share, indicating the distribution of company profits to shareholders.

Annual Dividend

The sum of all dividends a shareholder gets from a company over the course of a year.

Dividend Increases

An action taken by a company's board of directors to raise the amount of money paid to shareholders in the form of dividends, usually reflecting the company's strong financial health and positive future earnings outlook.