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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.
Anemophily - Cross-pollination It is also commonly referred to as wind pollination, i.e., the pollen grains are carried through wind currents. To ensure good pollination t
Indicating the name and respective ploidy of each involved cell how can the formation of sperm cells from germ cells be described? The formation of sperm cells, or spermatogene
Determine Causes of Malnutrition? You may recall studying about the causes of malnutrition earlier. The causes of malnutrition are classified as immediate (individual level), u
Regulation of Respiration Whenever the need for oxygen in the body increases, ventilation of the respiratory organs also increases. In the same way whenever the level of oxyge
Explain Pasteurization (temperature below 100° C) - method of food preservation? Pasteurization is a heat treatment that kills a part but not all the microorganisms present and
Define the Skin Capillary Fragility Test? One of the earliest signs of ascorbic acid deficiency is the fragility of the capillaries. Capillary fragility is measured by applyin
1,352,000
Punnet squares
Diffusion is the spreading of substance molecules from a region where the substance is more concentrated to other region where it is less concentrated. For example, during the boil
Q. Describe False Negaive Tests? When patients are found to have significant coronary narrowing and fail to have exercise induced ST depression, they have been labeled false ne
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