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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 minerals Definition of minerals, as it applies to food and nutrition usually refers to the elements other than carbon, hydrogen, oxygen and nitrogen that are present in
State the Testing of Ketones in Urine Ketones are also known as ketone bodies. Ketone bodies are catabolic products of free fatty acids and three ketone bodies that can be dete
what is meant by plasmodesmatsa
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Why do you think the mitochondria contain their own DNA (circular) and have a double membrane?
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What is the part of the female reproductive system where fecundation occurs? Fecundation generally happens in the Fallopian tubes but it can also take place within the uterus.
How does degradation/destruction differ on different vegatation zoner or at different heights?
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