Gregor Mendel's Theories of Genetic Inheritance

Only available on StudyMode
  • Download(s) : 327
  • Published : October 8, 1999
Open Document
Text Preview
Gregor Mendel's Theories of Genetic Inheritance

Gregor Mendel played a huge role in the underlying principles of genetic inheritance. He grew up in a Augustinian brotherhood where he learned agricultural training with basic education. He then went on to the Olmutz Philisophical Institute and then entered the Augustinian Monastery in 1843. After 3 years of theological studies, Mendel went to the University of Vienna where he was influenced by 2 professors, the physicist Doppler and a botanist named Unger. Here he learned to study science through experimentation and aroused his interest in the causes of variation in plants. Then in 1857, Mendel began breeding garden peas in the abbey garen to study inheritance which lead to his law of Segregation and independent assortment.

Mendel's Law of Segregation stated that the members of a paror of homologous chromosomes segregate during meiosis and are distributed to different gametes. This hypothesis can be divided into four main ideas. The first idea is that alternative versions of genes account for variations in inherited characters. Different alleles will create different variations in inherited characters. The sescond idea is that for each character, an organism inherits two genes, one form each parent. So this means that a homolohous loci may have matching alleles, as in the true-breeding plants of Mendel's P generation(parental). If the alleles differ, then there will be F hybrids. The third idea states that if the two alleles differ, the receessive allele will have no affect on the organism's appearance. So a F hybrid plant that has purple flowers, the dominant allele will be the purple-color allele and the recessive allele would be the white-color allele. The idea is that the two genes for each character segregate during gamete production.

Independent assortment states that each member of a paor of homologous chromosome segregates during meiosis independently of the members of other pairs, so that...
tracking img