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If R = Red and r = White

Which genotypes would result in a White phenotype?

Responses

RR
RR - no response given

Rr
Rr - no response given

RrRr
RrRr - no response given

rr

3 answers

In this scenario, where R (Red) is dominant and r (White) is recessive, a White phenotype would only be observed in individuals with the genotype that contains two recessive alleles, which is:

  • rr

The genotypes that result in a Red phenotype would include:

  • RR (homozygous dominant)
  • Rr (heterozygous)

The genotype RrRr is not a valid genetic designation in traditional Mendelian genetics.

So, the only genotype from your list that results in a White phenotype is:

  • rr
If R = Red and r = White

Which genotypes would result in a Red phenotype

In this scenario, where R (Red) is dominant and r (White) is recessive, the genotypes that would result in a Red phenotype are:

  1. RR (homozygous dominant)
  2. Rr (heterozygous)

Both of these genotypes will express the Red phenotype due to the presence of at least one dominant allele (R). Therefore, the genotypes that result in a Red phenotype are:

  • RR
  • Rr