A Lizard with a Striped Tail and a Normal Head

question 71

Multiple Choice

A lizard with a striped tail and a normal head is crossed with one having a normal tail and a spotted head. All of the F₁ progeny are normal (no stripes or spots) . What progeny would be expected to be produced by mating the F₁ progeny with each other, if the genes conferring stripes and spots were on different chromosomes?

• A) equal numbers of normal, striped, spotted and striped, and spotted
• B) 3 striped : 1 spotted
• C) 9 striped and spotted : 3 spotted : 3 striped : 1 normal
• D) 9 striped : 3 spotted : 1 striped or spotted
• E) 9 normal : 3 striped : 3 spotted : 1 striped and spotted

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Definitions:

Unequal Pupillary Constriction

A condition where the pupils of the eyes do not shrink to the same size in response to light, potentially indicating neurological issues.

Tear Production

Tear production involves the secretion of fluid by the lacrimal glands of the eye, providing lubrication to protect and maintain eye health.

Accommodation Response

The ability of the eye to change its focus from distant to nearby objects, involving the thickening of the lens.

Convergence

The inward movement of the eyes toward each other, typically occurring when focusing on a nearby object.