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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 Low Birth Weight cause Protein Energy Malnutrition? The beginning of PEM in children starts in US from the time of their birth. At least a third of the Indian children are
Describe how electro negativity can explain why a C-H bond is a no polar covalent bond, but a O-H bond is a polar covalent bond.
Why is it important to be familiar with the laboratory apparatus and their uses? If you do not use instruments or lab apparatuses correctly (or use an apparatus for something i
DIGESTION Digestive enzymes break down food particles into smaller units. You will see that the final breakdown products of protein digestion are single amino acids or small c
What resources are competed for by (a) animals, (b) plants? (a) Animals compete for food, mates and shelter. (b) Plants compete for light, water and minerals.
Q. Where can RNA are found within cells? In the eukaryote cell nucleus the RNA can be found to dispersed in the nuclear fluid, along with the DNA, and as the main constituent o
Ribosomes - It is also known as Protein factory, Engine of the cell. Ribosomes are smallest cell organelles (150 x 250 Å). Unit membrane less cell organelle. Ribo
Zoonotic Diseases The term zoonosis (zoonoses, plural) was coined by Rudolf Virchow to describe the disease transmitted from animal to man and vice versa. Zoonoses have been de
SIMILARITIE S BETWEEN CARDIAC AND SKELETAL MUSCLES - Both cardiac and skeletal muscles are made up of elongated fibres which have numerous myofibrils. The myofibrils of
Hepatitis A/B A combination vaccine containing the same antigenic components as Engerix-B and pediatric Havrix (Twinrix - GlaxoSmithKline) is available for patients >18 year
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