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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.
Why do some trees lose their green color in the autumn? In autumn days become shorter and nights longer therefore there is a reduction of the photosynthesis rate and some plant
What is meant by "mutualist exploration of cellulose digestion", a phenomenon that occurs in some mammals and insects? Herbivorous animals eat great amounts of cellulose, a sub
Fatty acid synthesis is the formation of fatty acids from malonyl-CoA and acetyl-CoA precursors by action of enzymes called as fatty acid synthases. It is a very significant part o
Effect of processing on mineral content of foods Minerals are comparatively stable under processing conditions such as heat, light, use of oxidizing agents and extremes in pH.
Is the epithelium vascularized? How do nutrients and oxygen reach the epithelium? Why is this feature a significant evolutionary acquisition? Epithelia are not vascularized (ca
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Nose Nose consists of external and internal parts. The inner lining of the nose contains millions of small receptors. These receptors are located on the sensory hairs.
1. You are observing adsorption of a virus to the host cell, it uses long leg-like structures, what are they called?
Hazardous Material - Factors Affecting Occupational Health Handling and storage of flammable and combustible liquids all the time pose threat to occupational safety. Fire and
How does the study of fossils strengthen the theory of evolution? The study of fossils reveals extinct and ancient species having many similar structures to others of the prese
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