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What is parthenogenesis?
A special case of reproduction in which two sexes are not required.
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Sex may be determined by _____ or _____.
- Chromosomal (sex chromosomes)
- Environment (teperature of incubation determines sex of some reptiles)
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Sex of Turtles and lizards are determined by what?
Teperature of incubation determines sex
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What are the basic components of the reproductive system?
- Gonads (Testes and ovaries)
- Gametes (sperm and eggs)
- Associated ducts, glands, chambers, and intromittent organs.
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The cortex of the gonad is of _____ origin, the _____ is of mesodermal orgin.
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The indifferent gond is invaded by _____ that grows into the medulla.
cords of germinal epithelium
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Describe primary sex chords (cords of germinal epithelium) in males and females.
- In males develop into seminiferous tubules of testis.
- In females, regardless and are replaced by secondary sex chords.
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Testies are connected to the body wall by what?
Mesorchium.
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Ovaries are connected to the body wall by what?
Mesovarium.
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The bulk of testies is _____.
Medullary
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The bulk of the ovary is _____.
Cortical
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Describe the development of Rete chords and describe them in males and females.
- Develop between developing primary sex chords and more anterior mesonephric tubules.
- In males, these canalize connecting gonad to the mesonephric tubules and archinephric duct, taking them over for the route of sperm passage.
- In females, rete chords regress and become vestigial.
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Describe the mullerian duct (oviduct).
- Forms from a groove-like invagination along mesonephros.
- Begins development in both sexes but degenerates in males and becomes oviduct in females.
- Connected to body wall by mesotubarium.
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