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21 Cards in this Set
- Front
- Back
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germ line
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collective term for embryonic germ cells
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gamete formation is called:
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gametogenesis
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oogenesis
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pron. oh-uh-jen-uh-sis
egg formation |
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oogonia
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diploid germ cells in the ovary
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ovum
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large, haploid cell; normally carries 22 autosomes and an X sex chromosome
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In humans, oogenesis begins in:
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the fetus; six months after conception, fetal ovaries are fully formed and contain about half a million primary oocytes arrested in the diplotene of meiosis I
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menses
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the periodic flow of blood and mucosal tissue from the uterus; menstrual flow
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At what age do most women become infertile?
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35 - 40 years of age
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the production of sperm is called"
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spermatogensis
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spermatogonia
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germ cells that begin in male testes
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germ
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a microorganism, esp. when disease-producing; microbe
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Each primary spermatocyte yields _____ spermatids
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four haploid
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The cell produced by meiosis that does not become a gamete is called:
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polar body
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haplodiploid sex-determination system
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sex is determined by the number of sets of chromosomes an individual receives
determines the sex of the offspring of many hymenopterans (bees, ants, and wasps), spider mites, coleopterans (bark beetles) and rotifers. |
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Duchenne muscular dystrophy (DMD)
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Progressive muscular wasting and usually death before age 20
Rare x-linked recessive |
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vestigial
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not fully developed
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nullo
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A term for not having inherited a sex chromosome
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__________ nondisjunction in a male will give XY sperm and nullo sperm
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meiosis I
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_______ nondisjunction in a male will result in half of the affected gametes being null while the rest receive 2 copies of one of the original sex chromosomes
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meiosis II
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What are the results of nondisjunction in MII males?
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Will give XX sperm or YY sperm and nullo sperm with no sex chromosome
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What is the result of nondisjunction in MI males?
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An XY sperm
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