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When Mendel crossed yellow-seeded and green-seeded pea plants, all the offspring were yellow-seeded. When he took these F₁ yellow-seeded plants and crossed them to green-seeded plants, what genotypic ratio was expected? (A) 1: 2: 1 (B) 3: 1 (C) 1: 1 (D) 1: 1: 1: 1

Respuesta :

The given situation is the case of a test cross and the genotypic ratio was expected out of it was 1:1.

A test cross may be defined as the cross between the F1 generation and the recessive homozygous individual.

Here, Mendel has crossed yellow-seeded and green-seeded pea plants and all the offsprings were yellow seeded plants, that is ,

                                            YY x yy

                                                   ↓

                                                  Yy→ F1 progeny

Then the F1 generation was crossed with homozygous recessive individual , green-seeded plant (yy) which is:

                                              Yy x yy

                                                    ↓

                                           Yy, Yy, yy, yy

Thus the genotypic ratio that was expected was 2 Yy : 2 yy, which furthers equals as 1:1.

To know more about test cross:

https://brainly.com/question/28100042

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