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How did Mendel discover the secret of human genetics?
Mendel was born in Hertzdorf in 1822, which belonged to the Austrian Empire at that time and is now a part of Czechoslovakia. 1843 entered an Augustine monastery in Brno, Austria (now Czechoslovakia). He was ordained a priest. 1850 took the teacher qualification examination, because the scores of biology and geology were too small and failed. Nevertheless, the abbot of his monastery sent him to study at Vienna University. He studied math and science there from 185 1 to 1853. Mendel never got a formal teacher's license, but from 1854 to 1868, he was a substitute teacher of natural science in Brno Modern Middle School.

During this period, starting from 1856, he completed his famous plant cultivation experiment. By 1865, he had drawn the famous laws of heredity and submitted a paper on these laws to the natural history society of Brno. The title of the paper is "Plant Hybridization Experiment". The second paper was published in the same magazine three years later. Although the Journal of the Natural History Society of Brno is not a very prestigious magazine, it is still collected by major libraries. In addition, Mendel sent a copy of his paper to Nichiri, an authority on genetics. Nikili read this paper and wrote back to Mendel, but he failed to understand the importance of this paper. From then on, Mendel's thesis was ignored and almost forgotten in the next 30 years.

1868, Mendel was appointed as the director of his monastery. Since then, his administrative affairs have left him little time to continue his plant experiments. 1884 When he died, his great experiment was almost completely forgotten by the world, and he was not recognized by the world because of his experiment.

It was not until 1900 that Mendel's work was rediscovered. At that time, three independent scientists (Defrees in the Netherlands, Corinth in Germany and Cermak in Austria) happened to see Mendel's paper. The three men each completed their own botanical experiments; Everyone independently discovered Mendel's law. Everyone studied the literature before publishing their experimental results, and happened to see Mendel's original paper; Everyone carefully quoted Mendel's paper and declared that their work confirmed Mendel's conclusion. What an amazing coincidence! In the same year, William Bateson, a British scientist, happened to see Mendel's paper and soon attracted the attention of other scientists. By the end of this year, Mendel got the applause he deserved in his lifetime.

What facts did Mendel discover in genetics? First of all, Mendel learned that there is a basic unit in all biological tissues, which is called gene today. Through genes, genetic characteristics can be passed from parents to the next generation. In the plants studied by Mendel, every feature, such as the color of seeds or the shape of leaves, is determined by a pair of genes. A plant inherits one gene from each pair of genes of its parents. Mendel found that if two genetic genes are endowed with different traits (for example, one gene comes from a green seed and the other gene comes from a yellow seed), then usually only the dominant gene (in this case, the yellow seed) plays a role in this individual. However, the recessive gene has not been destroyed and may be passed on to the offspring of plants. Mendel realized that each germ cell or gamete (equivalent to human sperm and egg cells) contains only one gene in each pair. He also pointed out that it is completely accidental that which gene in each pair of genes combines to form a gamete and passes it on to the offspring of an individual.

Mendel's law, although slightly modified later, is still the beginning of modern genetic science. Mendel did a lot of experiments (Mendel recorded more than 2 1000 plants! ), and use statistical methods to analyze these results in order to sum up his laws.

Obviously, the law of heredity is an important supplement to human knowledge. And our genetic knowledge may get more applications in the future. Mendel played an important role.

As an amateur scientist, Mendel discovered the law of heredity through diligent research, which laid the foundation for the genetic science of later generations and was admired by later generations.