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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 Incision - Endodontic Surgery Incisions are accomplished by using one of four scalpel blades: No. 11, No. 12, No. 15, and No. 15-C Horizontal incision should be m
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How is the circulatory system of reptiles characterized? What is the basic difference among the reptile and the amphibian heart? The circulatory system of beings of the class R
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How the Rhizopus reproduce? Rhizopus usually reproduce asexually, but under unfavourable conditions, sexual reproduction (isogamous) occur resulting in formation of zygospores
What problem would most likely to occur if a haploid cell attempted to perform meiosis?
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