BI-1539
Genetic crosses and ratios
Biology · Secondary 4 · Medium · Genetic crosses and ratios
In a species of plant, the allele for purple flowers (P) is dominant to the allele for white flowers (p). A heterozygous plant is crossed with a homozygous recessive plant. What is the expected ratio of purple-flowered to white-flowered offspring?
- 1 purple : 3 white
- 3 purple : 1 white
- 1 purple : 1 white
- all purple
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