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Pea Plant Experiments
Gregor Mendel experimented with pea plant genetics and established many of the rules of heredity, now reffered to as the Mendelian Inheritance laws -
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Livestock and Crop Enhancements
For the next 50 years scientists experimented with livestock and crops through breeding practices and improved the growth and yield of livestock and crops all. -
Meiosis was "Founded"
Meiosis was discovered and described for the first time in sea urchin eggs in 1876 by a German biologist by the name of Oscar Hertwig. Meiosis was discovered and described for the first time in sea urchin eggs in 1876 by the German biologist Oscar Hertwig in a parasitic worms eggs. In 1911 the American geneticist Thomas Hunt Morgan observed crossover in fly meiosis and provided the first genetic evidence that genes are transmitted on chromosomes. -
Technology Improves
Tecnology advacnces and microscopes gave scientists the ability to determine how genes were housed on larger structures called chromosomes -
The Down Syndrome Mutation was Discovered
In 1959, the French physician Jérôme Lejeune identified Down syndrome as a chromosomal condition. Instead of the usual 46 chromosomes present in each cell, Lejeune observed 47 in the cells of individuals with Down syndrome.
