LAMPBRUSH CHROMOSOMES

1. Discovered by Ruckert.
2. Lampbrush Chromosomes were seen in Oocytes of several different animals like shark, amphibians, reptiles and birds. (Most distinct in Diplotene stage).
3. Giant size of these Chromosomes is due to increase in size of Chromonema (not due to number). Chromonema grows in size to form lateral loops.
4. Synthesis of m-RNA occurs on lateral loops.
5. Lampbrush    Chromosomes    concerned    with vitellogenesis. (Yolk formation)

Posted Date: 10/8/2012 3:16:58 AM | Location : United States

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