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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.
How is extracellular digestion related to cellular and tissue specialization? Several of specialized cells and tissues appeared with extracellular digestion to give enzymes and
phylogenetic consideration
Mechanics of Locomotion Among annelids, polychaetes, hence more primitive than the other two groups, show a more complex mode of locomotion. Necessarily, the locomotion in po
Aerobic Based Water Treatment: Waste water provides organic materials and inorganic nutrients to river waters; this is known as eutrophication. This promotes microbial and plan
Q. Which are the groups of living beings that form the protist kingdom? The protist kingdom includes algae and protozoans. (Two groups of fungi with similar characteristics to
Define Importance of Nutrition in Human Body? Nutrition is increasingly being recognized as an important determinant, which modulates the biological process of ageing. Poor nut
Define Altered Fat Metabolism - Nutrition during Stress? Fat is the major fuel oxidized in infected patients. If nutrition support is inadequate, the peripheral fat stores are
Describe in brief about Pseudoisoehromatic Plates test Commonly known as Ishihara's plates, these reveal one pattern to the normal eye and another to the colour deficient. Colo
Q. How do chordates reproduce? Reproduction in beings of the phylum Chordata is sexual, with the exception of urochordates that can be also reproduce asexually. In some classes
OLIGOSACCHARIDES They are small-sized polymers of monosaccharides having 2 - 6 simple sugars, occasionally upto 9 - 10. Oligosaccharides are soluble in water, sweet to t
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