Reproduction

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Reproduction
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I. Sexual Reproduction - Meiosis
Spermatogenesis and Oogenesis
A. Production of gametes (egg and sperm)

• haploid (1/2 of chromosomes)

B. Male reproduction
1. Structure Testis
Seminiferous tubules Sertoli
cells (Spermatogenesis)
Hormone FSH
Interstitial cells Leydig cells
Hormone LH
stimulates testosterone
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2. Spermatogenesis
a. Spermatogonia

• undifferentiated germ cell

b. Primary spermatocytes

• Meiosis through Meiosis I

c. Secondary spermatocytes (2)
d. End of Meiosis II, spermatids
C. Female reproduction
1. Structure - Ovaries
Follicles contains oocytes
Hormone FSH target cells
of follicle
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Outer covering of follicle -
Theca
Hormone LH stimulates
estrogen
2. Oogenesis
a. Oogonia

• undifferentiated germ cell

b. Primary oocytes

• cloned cells (primary follicles)

c. Secondary oocytes

• end of 1st Meiotic division - 2 unequal cells

secondary oocyte polar body

• released from ovary - uterine tube

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d. Mature Ovum

• completion of Meiosis - only if 2nd oocyte is
  fertilized

II. Fertilization
3 days before to 1 day after ovulation