A Gene That Actively Controls the Expression of a Trait

question 283

Multiple Choice

A gene that actively controls the expression of a trait is called a __________ gene.

• A) recessive
• B) mutated
• C) recombinant
• D) dominant

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Definitions:

Color Spectrum

The range of all possible frequencies of electromagnetic radiation visible to the human eye, perceived as colors.

Rod Cells

Photoreceptor cells in the retina of the eye that are responsible for vision at low light levels but do not mediate color vision.

Retina

The thin layer of tissue that lines the back of the eye on the inside, composed of light-sensitive cells and responsible for converting light into neural signals for visual recognition.

Pupil

The black-looking opening in the center of the iris, through which light enters the eye.