When a tall pea plant with round seeds was selfed, it produced the progeny of tall plants with round seeds and

Question

When a tall pea plant with round seeds was selfed, it produced the progeny of tall plants with round seeds and some dwarf plants with wrinkled seeds. The genotype of the parent is:

Accepted Answer

, for a plant to produce progeny with recessive traits (dwarf and wrinkled) upon selfing, it must possess the recessive alleles for those traits. A tall plant with round seeds displaying the dominant phenotype for both characters must be heterozygous for both traits (TtRr) to produce a phenotypic ratio of 9:3:3:1 (Tall Round : Tall Wrinkled : Dwarf Round : Dwarf Wrinkled) in the F2 generation. If it were TtRR, no wrinkled seeds would be produced. If TTRr, no dwarf plants would be produced .

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