Class B Gene Mutation in Flowers – Biology MCQ

Practice question

Question

Mutation in class B genes results in absence of:

Options

Choose one · Correct answer highlighted

Sepals and petals Petals and stamens Correct Stamens and carpels Sepals only

Explanation

Pick B: Petals and stamens. Thinking through ABC MODEL step by step rules out the lookalikes and leaves Petals and stamens. Skip these: A) Sepals and petals; C) Stamens and carpels; D) Sepals only. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.

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