What will be the genotype splitting of hybrids from crossing homozygous for a dominant trait and heterozygous plants?
Let the dominant gene be O and the recessive gene o.
A plant homozygous for a dominant trait is OO. It produces the same type of germ cells – O.
Heterozygous plant – Oo. It is capable of producing two types of germ cells – O and O.
The offspring has the following appearance:
homozygous plants with a dominant trait (OO) – 50%;
heterozygous plants with a dominant trait (Oo) – 50%.
Thus, splitting by external signs will not be observed, and splitting by genotype will be a 1: 1 ratio.
Answer: 1: 1.
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