Term
| What are the 2 phases of folliculogenesis? |
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Definition
1. Preantral or gonadotropin independent phase- Growth and differentiation of oocyte.
2. Antral or Gonadotropin Dependent Phase- Tremendous increase in follicle size |
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Term
| When can atresia happen in folliculogenesis? |
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Definition
| After class 1 or secondary follicle stage, highest incidence in small-medium (class 5,6,7) Graafian follicles |
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Term
| Where does folliculogenesis occur? |
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Definition
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Term
| What does a primordial follicle have? |
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Definition
| A primary oocyte arrested in the prophase of meiosis I. |
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Term
| What is a primary follicle defined by? |
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Definition
| The presence of cuboidal granulosa cells arranged in a single layer surrounding the oocyte. |
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Term
| What is Sex Determination? |
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Definition
Translation of genetic sex into gonadal sex
Karyotype (46 XY or 46 XX) of the embryo (genetic sex) determine whether primordial gonad differentiates into a testis or an ovary respectively (gonadal sex). |
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Term
| What is Sex Differentiation? |
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Definition
| Translation of gonadal sex into acquisition of internal/external sex plumbing and organs |
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Term
| What are the precursors to gametes? |
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Definition
| Primordial Germ cells. Found in yolk sac near jxn of hindgut and allantois. Migrate 4-6 weeks after fertilization to developing genital ridges |
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Term
| Draw out Sex Determination of Male |
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Definition
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Term
| Draw Sex Determination of Female |
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Definition
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Term
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Definition
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Term
| What are the main points of Oogenesis? |
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Definition
1.Produces 1 egg and 2 polar bodies (all haploid).
2.Discontinuous process (oocytes arrest at MI and MII)
3.Oogenesis cycle for a particular oocyte can take months or years.
4.Only one egg is produced during a menstrual cycle. |
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Term
| What are the main points of Spermatogenesis? |
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Definition
1.Produces 4 haploid sperms.
2.Continuous meiosis process starting at puberty.
3.Spermatogenesis cycle take 64 days
4.Continuous wave of spermatogenesis produce several millions of sperm per day. |
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