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Explain Crossing Over in genetics?
Crossing over is when the arms of homologous chromosomes exchange segments (and therefore genes) with each other. Recall that one of the homologues originally came from the father's sperm and the other came from the mother's egg.
During Prophase I of Meiosis the homologous chromosomes pair up to form a tetrad. The arms of the chromatids overlap, and can sometimes swap portions. This exchange results in a genetic recombination of the parental genes, providing for genetic variation, the raw material for evolution.
what is the mode of nutrition of ascaris
Describe the Examination of Abdomen ? The contour of abdomen is to be recorded. Normally the abdomen is scaphold in sharp in a young adult. In case of fullness and bulge presen
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Can mitosis occur in haploid (n) cells? And in triploid cells? The mitotic cell division can happen in haploid (n) cells, diploid (2n) cells, triploid (3n) cells, etc. Mitosis
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There is no Interphase preceding second meiotic division. There is a brief intervening period called Interkinesis During this period there may be synthesis of some reserve fo
Explain about the Lignans? Lignans are diphenolic compounds formed by dilnerization of 2 cinnamic acid residues. Most lignans apparently pass through the GIT as fibre. Some lig
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