For a plant species, the allele for red flowers, $R$, is dominant over the allele for white flowers, $r$. Homozygous red-flowered plants, $RR$, are crossed with homozygous white-flowered plants, $rr$. What flower colour will the offspring from this cross have?
- Aall red
- Ball white
- Cequal numbers of red and white
- Dthree white to one red