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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.
Functions of cerebrum The forebrain is otherwise called as ‘cerebrum'. It is highest centre for controlling several functions in the body, The most interesting aspect
Subordinate Distinctions In addition to the above mentioned designations, master horizons are further characterised by specific properties such as distinctive colour or the ac
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In an adult male, which of the following is true? A. The plasma membranes of Leydig cells contain LH receptors. B. The plasma membranes of Sertoli cells contain FSH receptor
Which of the following will lead to a decrease in the amount of oxygen delivered to the body cells in a leg? A. A decrease in hydrogen ion concentration in red blood cells in t
Concerning their final products (daughter cells and their ploidies) what are the differences between mitosis and meiosis? In mitosis one cell, for example, with 2n chromosomes,
Colonial Theory - Metazoa This is the most popular theory on the origin of Metazoa. The idea was conceived by Haeckel (1874) modified by Metschnikoff (1886) and revived by Hy
Fatty acids have four main biological roles: 1. They are used to create sphingolipids and glycerophospholipids which are necessary elements of biological membranes; 2. Nume
Enzyme Activity Enzymes are biomolecules which catalyze (i.e. increase the rates of) chemical reactions. Almost all enzymes are proteins. In enzymatic reactions, the molecules
What are the types of proteins in metabolism of lens? Soluble Proteins Its synthesis takes place in the equatorial part on the surface of lens. a. Alpha crystallins
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