When a Gene Is Recessive, It Must Be Paired with a Second

question 579

True/False

When a gene is recessive, it must be paired with a second gene of the same type before its effect will be expressed.

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Definitions:

Nanometers

A unit of measurement equal to one billionth of a meter, commonly used to measure wavelengths of light and the scale of atoms and molecules.

Rods

Photoreceptor cells in the retina that are sensitive to low light levels and provide black-and-white vision.

Optic Nerve

The nerve that transmits visual information from the retina to the brain.

Fovea

A small depression in the retina of the eye where visual acuity is highest, due to the high density of cones, responsible for sharp central vision.