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Category - Biology

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A scientist is conducting an experiment to study inheritance of color in peas. In this study, green is dominant and yellow is recessive. If a homozygous green pea is crossed with a heterozygous green pea, what percentage of peas is expected to be green?
  1. 10%
  2. 25%
  3. 35%
  4. 50%
  5. 100%
Explanation
Answer: E, 100%. In this scenario, all peas produced are expected to be green.

Key Takeaway: Since green color is the dominant trait, yellow peas will only be observed if the yellow allele is inherited from both parents. Since one pea is homozygous for green, it is impossible for any daughter pea to have two alleles for yellow color.
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