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Haploid plants are preferred over diploids for mutation study because in haploids:

1. recessive mutation expresses immediately
2. induction of mutations is easier
3. culturing is easier
4. dominant mutation expresses immediately

Correct answer: recessive mutation expresses immediately

Solution

In haploids, each gene is present in a single copy, so any recessive mutation is directly visible in the phenotype. In diploids, a normal allele can mask a recessive mutant allele, delaying detection.

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