In narrow-leaved lupine, the color of flowers is controlled by the complementary genes R and B. If both genes in the plant

In narrow-leaved lupine, the color of flowers is controlled by the complementary genes R and B. If both genes in the plant genotype are in a dominant state, then the flowers will be blue; if the plant genotype contains the recessive bb alleles and the dominant R gene – pink, with other combinations of alleles of these genes – white. The white-flowered variety Unikrop (genotype BBrr) is crossed with the pink-flowered variety Severny 3 (genotype bbRR). What is the probability of the appearance of pink-flowered plants from backcrossing of F1 hybrids with each parental form?

a) The likelihood of the appearance of pink-flowered plants from backcrossing F1 hybrids with the mother is 0%;
b) the probability of the appearance of pink-flowered plants from backcrossing of F1 hybrids with the paternal individual is 50%.

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