Cluster-Of-Differentiation Antigens Are Found on

question 45

Multiple Choice

Cluster-of-differentiation antigens are found on

• A)B cells,where they determine the antibody types that are made.
• B)B cells,where they make recognition of self antigens on macrophages possible.
• C)T cells,enabling them to recognize foreign antigens on macrophages.
• D)macrophages,enabling them to link with both B and T cells.

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Definitions:

Positively Selected Allele

A positively selected allele is a variant of a gene that provides an advantage to individuals in their environment, increasing its frequency in the population.

Directional Selection

Directional selection favors individuals on one end of the distribution of phenotypes present in a population.

Paralogs

Genes within the same organism that have evolved by duplication and may have different functions.

Gene Family

A group of genes sharing a common origin that typically encode proteins with similar functions.