Forgot Password? New User? Sign Up. Create your account now. Signup with Email. Gender Male Female. Create Account. Already Have an Account? The number of polar bodies formed during oogenesis in human being is:.
Correct answer is option 'D'. Can you explain this answer? Related Test: Test: Human Reproduction- 1. Immediately after meiosis I, the haploid secondary oocyte initiates meiosis II. However, this process is also halted at the metaphase II stage until fertilization occurs.
When meiosis II has completed, an ootid and another polar body is created. Both polar bodies disintegrate at the end of meiosis II, leaving only the ootid, which eventually develops into a mature ovum. The formation of polar bodies serves to discard the extra haploid sets of chromosomes that have resulted as a consequence of meiosis. The Oogenesis Process : Diagram showing maturation of the ovum. Learning Objectives Differentiate among the stages of oogenesis and the actions of hormones during each stage.
Key Points Oogenesis starts with the process of developing oogonia via the transformation of primordial follicles into primary oocytes, a process called oocytogenesis. Some oogonia are arrested in prophase of meiosis I to become primary oocytes while the individual is still in utero.
The primary oocytes are surrounded by special supportive cells called follicular cells. Initially the supportive cells are flat and form primordial follicles. As follicular cells assume a more cuboidal shape, the follicle becomes a primary follicle. The primary oocyte contains 46 double structured chromosomes, or the diploid number. The primary follicle, containing a primary oocyte begins to grow at puberty. The primary oocyte contains 46 chromosomes, two of which are the sex chromosomes.
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