Question #6423838Single Choice

Biology

Question

A scientist performs a test cross with a heterozygous plant (Aa) and a homozygous recessive plant (aa). The expected 1:1 ratio of offspring is disrupted because a significant number of the offspring are aneuploid (having an abnormal number of chromosomes). Which conclusion can be drawn?

Options

Mendel’s Rule of Segregation is not universal due to mutations.

The experiment supports Mendel’s laws with minor statistical errors.

Nondisjunction occurred during gamete formation in the heterozygous parent.

The homozygous recessive plant experienced random mutations during meiosis.

Answer & Analysis

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