Apentix/AP Biology/Unit 5: Heredity/Question

AP Biologymediummcq1 pt

Morgan's fruit fly experiments showed white eyes were X-linked because

A.reciprocal crosses gave different results and the trait hit males more

B.the trait appeared in all offspring equally

C.it was inherited only through the Y chromosome

D.the trait skipped all males

Explanation

Core Concept

The white-eye allele rode the X chromosome: fathers passed it only to daughters, and males (single X) expressed it far more often.

Correct Answer

Areciprocal crosses gave different results and the trait hit males more

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