Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
What is Oogenesis ?
The female sex cells, or eggs, are formed in the ovaries, the primary sex organs of the female. The precursor of the egg cells, or oogonia, are formed during the prenatal development of the ovaries in the female embryo. However, the oogonia do not increase in number until after the third month of fetal development.
Oogonia divide by mitosis to form primary oocytes. These cells gradually die off, but about 200,000 are left in each ovary at puberty (about 11 to 14 years of age). Over the course of a woman's reproductive life, only about 450 oocytes will mature completely into eggs.
The primary oocyte begins meiosis, undergoing a very unequal division in which the larger cell becomes a secondary oocyte, and the other forms the first polar body, which eventually dies off. The second meiotic division, also unequal, forms a haploid ootid and a second polar body that also dies off. What is left is a single haploid egg cell or ovum (plural ova) that is 75,000 times larger than a sperm cell. The ovum contains contains proteins, lipids, and other raw materials for development. It is thought that the reason 3 of the 4 cells that result from meiosis die off is to provide the one surviving egg with sufficient resources for development.
Diagnosis Chest X-ray, Sputum Cytology Test Fibro Optic Bronchoscopy and Biopsy In later stage of disease - weight loss, Debility indicating metastasis Staging of
Stage 1 sleep: As an individual becomes drowsy, and enters stage 1, alpha wave decreases and theta waves appear. Theta waves with a frequency of about 6 to 8 cycles per second are
The probability of an individual in a trihybrid F2 generation showing the dominant phenotype for just two traits?
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Clostridium botulinum is an anaerobic, Gram-positive, spore forming, rod shaped bacteria that produces the potent neurotoxin. The organism and its spores are widely distributed in
Q. What are some factors that can lead to protein denaturation? Protein denaturation can be caused by temperature variation, pH change, changes in the concentration of surround
Each of the following are true of antimicrobial therapeutic drugs except A. Non-toxic to host B. Easily broken down by host C. Easily administered D. Limited capacity to elicit
What happens to a denatured enzyme regarding its functionality? How can that result be explained with the help of the lock and key model? According to the lock and key model th
What is Allantois One of the extraembryonic eggs found in the amniote animals. The allantois contains the metabolic wastes created by the developing embryo. May also be involved
Q. Considerations for congestive cardiac failure? - Subjects with congestive cardiac failure often tolerate small frequent meals better than larger infrequent meals as these a
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd