In a genetic cross between two flowering plants that are heterozygous for the color trait, red flowers (R) are dominant to white flowers (r). What fraction of the offspring should have red flowers?

Three–fourths of the offspring should have red flowers.

One–half of the offspring should have red flowers.

One–fourth of the offspring should have red flowers.

Question

In a genetic cross between two flowering plants that are heterozygous for the color trait, red flowers (R) are dominant to white flowers (r). What fraction of the offspring should have red flowers?

Three–fourths of the offspring should have red flowers.

One–half of the offspring should have red flowers.

One–fourth of the offspring should have red flowers.

anonymous · Answer

Only 1/4 would be red.

The remaining 1/2 would be pink (due to the heterozygous genotype) and the other 1/4 would be white (due to the homozygous recessive).