What are the genotypes of the parents and F1 hybrids, if the red color and round shape of tomato fruits are dominant traits

bystudin | October 27, 2020 | Education

What are the genotypes of the parents and F1 hybrids, if the red color and round shape of tomato fruits are dominant traits, and the yellow color and pear shape are recessive traits? Prove that with such a cross, the law of independent gene distribution is manifested.

1. P: AaBb x aaBb; F1: AaBB, 2AaBb, Aabb, aaBB, 2aaBb, aabb.
2. The inheritance of the color trait of tomato fruits occurs regardless of their shape, namely, the ratio of the number of red fruits to yellow ones is:
(37% + 14%): (37% + 12%) = 1: 1,
and round to pear-shaped:
(37% + 37%): (14% + 12%) = 3: 1.

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