Many quantitative and some qualitative characteristics in living organisms are determined not by one, but by several pairs of interacting genes. In this case, the more dominant genes
Chromosomal theory of heredity Based on the experiments carried out, T. Morgan formulated the law of linked inheritance. Genes located on the same chromosome are inherited together, forming
In nature, there are two types of inheritance of several genes: independent and linked. Independent inheritance Independent inheritance occurs when genes that determine non-allelic traits are located on
American geneticist Thomas Morgan studied the patterns of inheritance of genes located on one homologous chromosome. In the experiments, Morgan used the fruit fly Drosophila, which has qualities
During gametogenesis, different chromosomes, and with them genes, end up in different gametes. Gene A can be in the same gamete as gene B or gene b. With
Crossing in which the parental individuals differ in two pairs of alleles is called dihybrid. Hybrids that are heterozygous for two genes are called diheterozygous. Their genotype is
In the experiments of G. Mendel, the dominant trait completely suppressed the manifestation of the recessive one. But in some cases, Mendel was faced with contradictions that he
By phenotype, it is not always possible to determine what genotype a given individual has. The genotype may not be known with complete dominance: the dominant homozygote and
During gametogenesis, different chromosomes, and with them genes, end up in different gametes. Gene A can be in the same gamete as gene B or gene b. With
