Question

a certain plant species, the allele for red flowers (R) is dominant to the allele for white flowers (r). What is the phenotype result of a cross between two groups of red-flowered plants, both of have all individuals that are heterozygous for the gene.



A.
all red flowers; no white flowers


B.
1/4 red flowers; 3/4 white flowers


C.
all white flowers; no red flowers


D.
1/4 white flowers; 3/4 red flowers