Multiple choice

___________ is an example of incomplete dominance.

  1. Mirabilis jalapa

  2. Pisum sativum

  3. Mangifera indica

  4. Aloe vera
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A Correct answer
Explanation

Mirabilis jalapa (4 O'clock plant) is the standard example of incomplete dominance in genetics. When plants with red (RR) and white (rr) flowers are crossed, the heterozygous offspring (Rr) produce pink flowers - an intermediate phenotype. This clearly demonstrates incomplete dominance where neither allele is completely dominant.

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