A Lizard with a Striped Tail and a Normal Head

question 4

Multiple Choice

A lizard with a striped tail and a normal head crossed with one having a normal tail and a spotted head produce all normal (no stripes or spots) F₁ progeny. What progeny would be expected to be produced by mating either of the parental lizards with another that had a striped tail and spotted head, if the genes conferring stripes and spots were close together on the same chromosome?

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

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Definitions:

Unidirectional

Moving or operating in a single direction.

Bidirectional

A relationship or interaction where effects or communications flow in both directions between parties or factors.

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A situation or period in an individual's life when there is a potential for an important change in the integration of their identity or social relationships.

Erik Erikson

A developmental psychologist and psychoanalyst known for his theory on the psychosocial development of human beings, which describes eight stages from infancy to adulthood.