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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.
The effect of natural selection on colonies or population favouring one group in preference to other may be referred to as group selection. A group can be the smallest collection o
What do you understand by the terms retrogradation and gelatinization? The realignment of the amylose and amylopectin and swollen starch granules to form a pocket is termed
Explain the term Ageing? Ageing in human being is of a multifunctional origin and there is a programmed senescence (ageing) of the cells in the body. The genetic make-up of an
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Explain in detail about the Concomitant squint Concomitant squint is also called comitant squint. It means "I follow you", i.e., in all directions of gazes, the squinted eye fo
Which of the following does NOT contain a guanidinium group Select one: a. Urea b. arginine c. creatine d. guanidinium ion
Explain the Periapical surgery - Endodontic Surgery a) Curretage 1 b) Root-end ressection 2 c) Root-end preparation 3 d) Root-end filling 4
Biological Conduits : Freeze dried arterial, bovine MA, human umbilical vein, cryo preserved umbilical vein or artery and omniflow sheep collagen tube grafts also have poor
Anticodon is the series of three nucleotides on the transfer RNA molecule which recognizes and pairs with the specific codon on a messenger RNA molecule; it helps in controlling t
What is the function, other than protection, of the ribs? The ribs help to alter the volume of the thorax during breathing movements.
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