When two heterozygous individuals of the first generation are crossed, in the offspring in the offspring there
When two heterozygous individuals of the first generation are crossed, in the offspring in the offspring there will be a certain proportion of individuals exhibiting a recessive trait. This position is illustrated by the following genetic law: 1) the law of splitting 2) the law of domination 3) the law of linked inheritance 4) the law of independent distribution of genes
Answer: 1) the law of splitting.
Heterozygous individuals have the Bb genotype and produce two types of germ cells – B and b. Offspring includes the following options:
homozygous individuals with a dominant trait (BB) – 25%; heterozygous individuals with a dominant trait (Bb) – 50%; homozygous individuals with a recessive trait (bb) – 25%. In other words, the progeny splits into several phenotypic and genotypic variants.