What Are the Different Types of Geneticist Jobs?
The three basic laws of genetics were proposed by Mendel and Morgan during 1856-1864. The three basic laws are the law of gene separation, the law of free combination of genes, the law of linkage and exchange of genes [1] .
Three Basic Laws of Genetics
- Law of free combination
- After the Mendelian genetic law was rediscovered in 1900, more and more animals and plants were used for cross-breeding experiments. Among them, the results of inheritance of two pairs of traits, some of which were consistent with the law of independent distribution, and some were not. . Morgan researched on Drosophila as the experimental material, and finally confirmed that some examples of so-called non-inheritance laws are not actually independent inheritance, but belong to another type of inheritance, namely, linkage inheritance. So following Mendel's two laws of inheritance, the law of linkage interchange became the third basic law in genetics. The so-called chain interchange law is that the two traits originally owned by the same parent often have a tendency to be linked together in F2. This phenomenon is called linkage inheritance. The discovery of the law of linkage genetics confirms that the chromosome is the carrier of genetic genes that control traits. Through the exchange measurement, it was further proved that the genes have a certain distance order on the chromosome and are arranged in a straight line. This has laid a solid scientific foundation for the development of genetics.
Three Basic Laws of Genetics Discover People
- Discovered by American biologist and geneticist Thomas Hunt Morgan in 1909.
- Morgan
Three basic laws of genetics
- During the formation of germ cells, genes located on the same chromosome are linked together and transmitted as a unit, called the linkage law. During the formation of germ cells, exchanges between different alleles on a pair of homologous chromosomes can occur, known as the law of swap and the law of swap.
Scope of the three basic laws of genetics
- Non-alleles located on homologous chromosomes.