If the genotype is pp, which trait will appear?

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Prepare for the Virginia 7th Grade Science SOL Test. Incorporate flashcards and multiple choice questions, each with hints and detailed explanations. Ensure your success on the exam!

Multiple Choice

If the genotype is pp, which trait will appear?

Explanation:
When both alleles are recessive, the recessive trait is shown. With a genotype of pp, there is no dominant allele to mask it, so the recessive phenotype appears. For example, if the dominant allele (P) codes for purple and the recessive allele (p) codes for white, a plant with pp would be white. The idea here is that a dominant trait would show up if at least one dominant allele were present (PP or Pp), which is not the case with pp. Hybrid or incomplete dominance refer to different combinations or patterns of expression that don’t apply to this genotype.

When both alleles are recessive, the recessive trait is shown. With a genotype of pp, there is no dominant allele to mask it, so the recessive phenotype appears. For example, if the dominant allele (P) codes for purple and the recessive allele (p) codes for white, a plant with pp would be white. The idea here is that a dominant trait would show up if at least one dominant allele were present (PP or Pp), which is not the case with pp. Hybrid or incomplete dominance refer to different combinations or patterns of expression that don’t apply to this genotype.

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