The Term "Oligogenic Disorder" Refers to

question 10

Multiple Choice

The term "oligogenic disorder" refers to

• A) a trait or disease caused by at least two genes that contribute equally.
• B) a trait or disease caused by one major gene and smaller effects of other genes.
• C) a trait or disease that affects several body parts.
• D) a trait or disease caused by small inputs from many genes, with no major gene.
• E) a disorder that ranges greatly in severity.

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Definitions:

Chromosomes

Structures within cells that contain DNA and carry genetic information important for the development, functioning, and reproduction of living organisms.

Fertilization

The union of the ovum and sperm.

Recessive

Pertaining to a gene that is expressed in the phenotype only when its allele is identical, needing two copies (one from each parent) to exhibit the trait.

Dominant

Referring to a trait, gene, or characteristic that supersedes another in genetic expression when both are present.