In tomatoes, the round shape of the fruit dominates over the pear-shaped one. Determine the genotypes
August 27, 2021 | education|
In tomatoes, the round shape of the fruit dominates over the pear-shaped one. Determine the genotypes of the parental forms, if the offspring have 50% of plants with round and 50% with pear-shaped fruits. Tomatoes of 118 plants with pear-shaped and 363 plants with round fruits were grown from hybrid seeds. How many are F1 heterozygotes among all F1 plants?
Mendel’s first law
R: Aa x aa
F1: Aa, Aa, aa, aa
P: Aa x Aa
F2: AA, Aa, Aa, aa
We get 3/4 of the fruit, which is (363) with a round fruit shape and 1/4 (118) with a pear shape.
That is, the proportion of heterozygotes was approximately 242 round-shaped fetuses.
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