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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
Q. What are the specialized structures that help the adhesion between cells? The structures responsible for the union of the epithelial cells are called cell junctions. The mai
PHYSICAL STATE OF PROTOPLASM Several theories have been given about its physical structure - (i ) Granular Theory (Proposed by Altman, Hanstein, 1886) - Granules embed
GERENAL CHARACTERICS OF PHYLUM ANNELIDA
A woman was injured several years ago in a car accident and she was diagnosed with a herniated disc. Can you please explain using the correct anatomical terminology what herniation
WHY NETWORKING IN HOSPITALS Sharing of data is essential, especially in any kind of hospital setting. For staff and doctors of a hospital, if they have details of patients rea
What is HMP pathway The HMP pathway like glycolysis occurs in the cytosol of the cell. However, C02 which is not produced in glycolysis, is a characteristic product in HMP
What is the difference between the concepts of karyotype and genome? Genome is the set of DNA molecules that characterizes each living being or every species. The concept then
Hybridization is the reaction by which pairing of the complementary strands of nucleic acid happens. DNA is usually double-stranded, and when these strands are separated form each
What is the endocrine function of the placenta? The placenta is not a permanent gland of the endocrine system but it also has endocrinal function. The placenta produces estroge
Age Distribution - Population Parameters and Regulation It is obvious that individuals in a population will be of different age groups. Relative numbers of young and old indiv
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