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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.
Explain how human activities can cause an imbalance in biogeochemical cycling and lead to problems such as cultural eutrophication and fish kills
Explain the Obesity - Problems of Older Children and Adolescent Nutrition? One of the major problems is raising obesity rates (upto 30%) in urban, well-to-do school children.Th
Galactosemia Inability of conversion of galactose to glucose results in the accumulation of galactose in the blood - known as galactosemia. The biochemical defect usuall
In the absence of any large scale envirorrmental change that is, in more or less uniform environments, populations often maintain a stable genetic constitution with respect to many
Q What is genetic code? Genetic code is the key for the conversion of the DNA nucleotide sequences and thus the RNA nucleotide sequences into amino acids sequences that will co
ORIGIN (1) From Pro plastid (2) Division (3) Endosymbiotic origin from a cyanobacterium
What is meant by substrates of enzymatic reactions? Substrates are reagent molecules upon which enzymes act. The enzyme has spatial binding sites for the attachment of its s
Question 1 Write a short note on the following- Totipotency Soma clonal variation Bioreactor Virus indexing Question 2 List and explain any 4 advantages of
Effects of Noise - Noise Pollution Noise can affect in the following three ways: Interferes with communication, Diminishes hearing and Affects health and even
When glucagon binds to it's receptor on a liver cell, which one of the following sequences of events occurs to activate protein kinase A? -activation of G protein, activation of
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