In four oʼclock plants, R is the allele for red color and W is the allele for white color. Two pink flowered four oʼclock plants were crossed. Show the possible outcome of the cross between two pink (RW) flowered four o’clock plant by using the Punnett square.

Please find the punnet square attached.

Genotype of offsprings: RR(1), RW(2), WW(1)

Phenotype of offsprings: 1 Red: 2Pink: 1White

Explanation:

This question involves a single gene coding for flower color in four oʼclock plants. The alleles for red flower (R) and white flower (W) exhibit incomplete dominance, hence, results in a third phenotype that is pink (RW).

If two pink flowered four oʼclock plants were crossed i.e. RW × RW, the following gametes will be produced by each parent

RW - R and W

Using these gametes in a punnet square (see attached image), the following genotype and phenotype of offsprings will be produced.

Genotype of offsprings: RR(1), RW(2), WW(1)

Phenotype of offsprings: 1 Red: 2Pink: 1White

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