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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.
If the chemical formula of a substance is C17 H 31 COOH, what can you tell about the identity and amounts of elements in the molecule? Can someone please explain me this?
Q. What do you mean by syphilis? The Syphilis, as well known as lues, is a disease caused by the bacteria Treponema pallidum. Before the invention of penicillin, syphilis was a
Explain the Metabolic Alterations during Cancer? As we have studied earlier, patients with advanced cancer experience profound anorexia, early satiety, changes in the structure
Q. How much DNA is in a typical human cell? If DNA (deoxyribonucleic acid) molecules in a single human cell were stretched out and laid end to end they will measure approximate
fertilization occurs when the ?
what is the problem that the theory of evolution and its rival theories try to solve?
Q. What are the major divisions and representing species of the gymnosperms? This group of plants can be separated into conifers (pine, sequoia, cypress), that have flowers cal
Properties of Phytochrome Phytochrome is a chromoprotein: this means it is composed of a protein and a chromophore. The chromophore is actually attached to the protein and is
Determine the Categories of Drug and nutrient relationship? Drug and nutrient relationship can be categorized into two aspects: 1. Effect of nutrition on drugs: the influenc
Why did giraffes develop long necks? 1) Describe an experiment to test this hypothesis. Be explicit about the methods you will use, the setting, the time that the experiment wil
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