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Oogenesis
Oogenesis is the formation of ovum from oogonial cells that are formed in the ovary from primordial germ cells. And as in spermatogenesis it involves meiosis to produce haploid ovum. You have learnt in the section on spermatogenesis that the differentiation of sperm occurs after the meiotic events. In oogenesis the process of first meiotic division is very prolonged; and it is during this process that growth and differentiation of oocyte take place. In many animals most events related to oocyte differentiation occur during prophase I of first meiotic division. In animals which produce yolk-laden eggs, this phase is divided into
In During translation, the series of an mRNA molecule is examined from its 5' end by ribosomes that then synthesize an appropriate polypeptide. Together in prokaryotes and in eukar
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What is crossing over? How is meiosis related to this phenomenon? The Linked alleles for instance, A-b and a- B form the gametes A-b and a-B that maintain the linkage of the al
Explain Fats in biological compound ? Fats : Monoglycerides, diglycerides, and triglycerides are fats consisting of a backbone of the alcohol molecule glycerol, consisting of
Which of the below are skin receptors in humans which are sensitive to heat? Are they: a) End organs of Krause b) Meissner's corpuscles c) End organs of Ruffini d)
Importance of water in the body Water is the most essential constituent of life. Life cannot exist without water. About 90% of water is present in protoplasm Water
Explain about the Calcium and Hypertension? Chronic inadequate intake of calcium may play some role in etiologies of hypertension. Calcium deficiency has been linked to hyperte
Define the Uremia and Nitrogen Disposal? In animals, faecal and renal nitrogen were enhanced and decreased uremia was seen in normal and nephrectomised animals. The mechanisms
Protein Digestion Enzymes that digest proteins are divided into two groups endopeptidases and exopeptidases according to site of their action in the protein molecule. Endopept
Categories of Gifted Species This group of nitrogen fixers has been divided into three categories: Rhizobium which includes fast growing species, Bradyrhizobium which
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