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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
Leptospirosis Synonyms: Weil’ disease, canicola fever, 7-day fever Leptospirosis is an important and widespread zoonosis. It was first described by Adolf Weil in 1886 when h
Mammalian Heart The division of heart and separation of systemic and pulmonary circulation is complete in birds and mammals. The structure of mammalian heart and also how the
Q. What is the defense mechanism that begins to work when inflammation fails to stop an infection? If the inflammatory attack is not sufficient to halt the infectious process t
Regulation of pyruvate kinase, pyruvate carboxylase and PEP carboxykinase A) In liver, pyruvate kinase is inhibited by high levels of ATP and alanine so which glycolysis
Biodiversity is multiple resource based offering us a range of products, materials and services. Our survival and well being of man-kind is directly dependent on biodiversity. Biod
Explain the Bioavailability of nutrients? The amount of many nutrients needed in the diet depends on the absorption or bioavailability of the nutrients. Bioavailability is defi
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Genomic clone is the piece of a DNA taken from genome of a cell or an animal, and spliced into the bacteriophage or other kind of cloning vector. A genomic clone might contain cod
Primitive Arthropods The primitive arthropods, Onychophora (for example Peripatus) have a series of paired legs which are not jointed but have a ringed appearance because of t
Q. Genetic resources of biodiversity? Genetic diversity or the gene pools are important for promoting and ensuring high agricultural yield. Genetic diversity provides crops wit
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