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Yellow & Green 6. Flower position ...................... Axillary & Terminal 7. Stature ........... : ..................... Tall & dwarf On intensive studies of these characters Gregor Mendel has observed that characters written first in column 3 are dominant over characters written later in same column. Various experiments of John Gregor Mendel have revealed some important phenomenon which became well known as principles of heredity. These principles are followings. 1. Law of dominance. 2. Law of segregation.

With the separation of homologous chromosomes interstitial chiasmata can get converted into terminal chiasma. Theprocess is Simple. Due 31 Genetics: Fundamentals and Applications e. to movement in centromeres the homologous chromosomes moves apart. So interstitial chiasma moves towards end of the chromosome. Thus ultimately it becomes terminal chiasma. This movement of chiasma is known as terminalization. At diplotene stage length of chromosomes gets reduced but their thickness increases. Diakinesis: At diakinesis chromosome appears short and thick, Nucleolus starts disappearance and completely disappears by the and of diakinesis.

Due 31 Genetics: Fundamentals and Applications e. to movement in centromeres the homologous chromosomes moves apart. So interstitial chiasma moves towards end of the chromosome. Thus ultimately it becomes terminal chiasma. This movement of chiasma is known as terminalization. At diplotene stage length of chromosomes gets reduced but their thickness increases. Diakinesis: At diakinesis chromosome appears short and thick, Nucleolus starts disappearance and completely disappears by the and of diakinesis.

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