Question

When a heterozygous plant is crossed with its homozygous recessive parent, so that the alleles carried by the heterozygous parent segregate and combine with only the recessive allele from the other parent, the phenotypic ratio expected among the offspring is:

A 3:1
B 1:1
C 9:3:3:1
D 1:2:1
E 9:7
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