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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
Phases of Ovarian Cycle In non-mammalian vertebrates the ovarian cycle consists of the following phase; Pre breeding phase Breeding phase and Post breedin
Define Endocrine or Hormonal Disorders - Infertility Infertility can be caused by endocrine disorders, long-term sequelae of sexually, transmitted infections, puerperal sepsis,
Sulphur (S) - Macronutrients Sulphur is present in the soil in inorganic and organic forms. In most soils organically bounds is the major S reservoir. The inorganic forms of S
Q What are the three major types of nitrogen wastes excreted by living beings? The main nitrogen wastes excreted by living beings are ammonia, urea and uric acid. Living beings
Q. Meaning of Gestational Diabetes Mellitus? In this type of diabetes, increased blood sugar level is first diagnosed or recognized during pregnancy. Women are not known as dia
What is the cellular structure to which mRNA molecules bind to start the protein synthesis? To make proteins mRNA molecules of necessity associate to ribosomes. Ribosomes have
In the last unit we traced the human evolutionary history mostly from a palaeontological viewpoint. Although still fragmentary, the available fossil evidence makes it possible to c
Types of dietary adaptations for trerapieutic needs Normal nutrition is the foundation upon which therapeutic modifications are based. We have already discussed in previous
Nature and Distribution of Viruses Although several infectious diseases of animals and plants had been found to be caused by viruses during early 20 th century, the true natur
Question 1 Write short note on inflammatory response 2 Give an account of attenuated vaccines 3 What is innate immunity? Explain its characteristic features 4 What adjuvants? E
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