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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.
Lens - Organogenesis of Eye and Limb There is much experimental proof that the lens formation in many species is dependent on the induction by the optic vesicle while it conta
The cyclic exchange of nutrient material between organisms and non-living environment is called biogeochemical cycle ,'geo means earth: ''chemical' means chemical elements, thus
Vasa are a maternal-effect gene whose product functions in development of the posterior end of the Drosophila embryo. runt is a non-maternal-effect gene whose product functions in
What are the symptoms of diabetes Healthy Person P takes a drug that produces a strong effect on the epithelial cells of the kidney collecting duct within one hour and lasts f
How do leucine zipper binding motifs regulate gene expression?
Q. How does the pulmonary ventilation affect the carbon dioxide concentration in blood? What happens to the carbon dioxide concentration and to the blood pH when the respiratory fr
give the discriptive account of nerilla which belongs to class arciannelida in phylum annelida
Explain the Consequences of Malnutrition? Malnutrition manifests itself in terms of illness and death in all age groups. Children, pregnant women, nursing mothers and elderly a
what is bowman''s capsule?
Define the Concept of Health - Public Nutrition? The most widely accepted definition of health is the one given by WHO (1948) in the preamble to its constitution, Box 1 gives t
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