In Mammals, Dosage Compensation Refers to a Mechanism in Which

question 172

Multiple Choice

In mammals, dosage compensation refers to a mechanism in which:

• A)the level of expression for a given gene is directly related to the number of copies of the gene.
• B)genes in the Y chromosome must be expressed at higher levels than would otherwise be the case because they are not homologous with genes on the X chromosome.
• C)genes in the X chromosome must be expressed at lower levels than would otherwise be the case because they are not homologous with genes on the Y chromosome.
• D)X chromosome genes are regulated differently in males and females because members of one sex have two X chromosomes, whereas members of the other have only one.
• E)None of the answer options is correct.

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Definitions:

Innate Immunity

The first line of defense in the immune system, comprising physical, chemical, and cellular defenses against pathogens.

NK Cells

Natural Killer cells, a type of white blood cell that plays a critical role in the body's immune response by attacking infected or cancerous cells.

Cytotoxic T Cells

Cytotoxic T cells are a type of white blood cell that can directly kill infected cells or cancer cells by recognizing specific antigens on the cell surface.

Innate Immunity

The first line of defense in the immune system, consisting of physical, chemical, and cellular defenses against pathogens.