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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.
Maintenance of Gut Lining After studying the digestive enzymes you would wonder why the gut linings are not digested themselves. This is because animals have several mechanism
Q. Explain Food borne toxic infections? Ans. The food borne toxic infections, you may recall reading earlier, are caused by the ingestion of a large numbers of ent
The major concentration of noradrenergic (and adrenergic) cell bodies is found in locus ceruleus a nucleus in the reticular formation. The axons of these neurons project through t
Q. Why does not a long lasting vaccine against common cold exist yet? Viruses that present a high mutation rate like the virus that causes the common cold escape easily from th
Explain Adverse Effects of Oseltamivir Nausea and vomiting can occur. Taking the drug with food decreases the incidence of nausea. In juvenile rats, very high doses of osel
Q. What is the difference between heterologous and homologous immunoglobulins? Homologous immunoglobulin is the human from the same species immunoglobulin and In case of inocul
What are the risk factors of cataractogenesis? Risk Factors of Cataractogenesis: a. Hereditary b. Exposure to ultra violet radiation: The ultra violet radiation of 290
Define about the Ultraviolet rays - carcinogenic? Ultraviolet rays: There is ample evidence from epidemiological studies that ultra violet rays derived from the sun induce an i
Segments of Environment: The environment is not a simple distribution of gases but is highly complex and structured. It comprises of four segments: Lithosphere
Explain Methodology Required for Osazone Test? Take about 250-300 mg of phenylhydrazine mixture in the 3 clean labelled 15 ml dry test tubes. Add 5 ml of the glucose, fructose
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