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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.
Define the symptoms in Bone marrow of pernicious anaemia? The nucleated red cells of the marrow are greatly increased. The successive nucleated cell stages in erythropoiesis a
Q. What is the acrosome of the sperm cell? How is it formed? The acrosome is a structure that contains a great number of digestive enzymes it is formed by the union of Golgi ap
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Describe the process of biosynthetic phase of photosynthesis occurring in the chloroplast. Explain the process of development of root nodules in a leguminous plant. Name the ox
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What is Mendel's Crosses in genetics explain breifly? Mendel found that if he transferred pollen from a green-seed strain to a yellow-seed strain and vice versa, in a process c
Define Objective of Taxonomy - Assemblage of Knowledge Gained? A second objective of taxonomy is the assemblage of knowledge gained. This is usually in the form of treatises us
Respiration It is important that you comprehend the main points because they ate essential for your understanding of respiratory physiology. To enter or leave the body, oxygen
Occlusal load affect Osseointegration The timing and amount of overload are critical for osseointegration. Occlusal loading early, where the primary stability is low leads to h
EGESTION To give out undigested food from alimentary canal. Faeces can remain in colon for 36 hrs. then moving into rectum by gastro-colic reflex. Faeces consists of 3
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