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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.
Endocrine glands Endocrine glands have no ducts - so these are also called as ductless glands Eg.Pituitary etc., These glands secrete chemical substances called HORMONES
justify the claim that paramecium is the highly evolved protozoan basing on the morphological and physiological features .
Classification of zoonoses More than 300 zoonoses of diverse etiologies are recognized. Thus, a very large number of zoonoses call for classification, especially for teaching
Define about the Physical Fitness? Physical fitness is a general term we come across quite often and use it to describe an individual if he or she is able to carry out a variet
Q. Bird identity card. How are birds characterized according to examples of representing beings, basic morphology, respiration, skin, nitrogen waste, circulation,thermal control an
The principle of homeostasis is controlling the heating system with a simple thermostat in a house. These components are essentials thermometer, source of heat turning it on or off
general charactres and classfication
Q. Carbohydrates requirement in chronic diarrhoea? Adequate amount of carbohydrates i. e 60-65% of the total energy should be given to the patient. Easily assimilated carbohydr
How is the early diagnosis of genetic diseases usually done? Genetic disease might be diagnosed in the prenatal period by karyotype analysis, in case of aneuploidies, or by DNA
what is the definition of phylum coelenterata?
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