The early maturity gene in oats dominates the late maturity gene; the gene for normal growth is over the gene for giant growth.

The early maturity gene in oats dominates the late maturity gene; the gene for normal growth is over the gene for giant growth. The plant of an early maturing variety of normal growth was crossed with a plant of a late maturing variety of giant growth. In the offspring – early maturing normal growth, early maturing giants, late maturing normal and late maturing giant in a ratio of 1: 1: 1: 1. Determine: 1) the genotypes of the crossed plants; 2) genotype of offspring from backcrossing of late maturing normal growth of F1 plants with parental forms.

Let us designate the dominant and recessive alleles of genes: A – early maturity, a – late maturity, B – normal growth, b – gigantism.
1) Genotypes P: (women) AaBb, (husband) aabb;
2) a) genotypes of offspring from backcrossing of late maturing normal growth of F1 plants with the parent plant – AaBB, AaBb, aaBb, aabb in a ratio of 1: 1: 1: 1;
b) genotypes of offspring from backcrossing of late maturing normal growth of F1 plants with the parent plant – aaBb, aabb in a ratio of 1: 1.

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