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10 Cards in this Set
- Front
- Back
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gametes
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Haploid reproductive cell. 2 gametes, most often egg or a sperm, join in fertilization to form a zygote.
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homologous chromosomes
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Similarly constructed chromosomes with the same shape and contain genes for the same traits.
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synapsis
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Pairing of homologous chromosomes during prophase I of meiosis.
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interkinesis
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Period of time between meiosis I and II during which no DNA replication takes place.
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endometrium
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Lining of the uterus, which becomes thickened and vascular during the uterine cycle.
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zona pellucida
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Jelly coat around the egg. Acrosome enzymes digest zona pellucida as acrosomes extrude filament that attaches to receptors located in vitelline membrane.
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cleavage
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Cell division without cytoplasmic addition or enlargement. Occurs during first stage of development.
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fertilization membrane
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The vitelline membrane becomes fertilization membrane of sperm and egg fuse. Any other sperm are prevented from entering.
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blastocoel
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fluid-filled cavity of a blastula.
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trophoblast
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Outer membrane surrounding the embryo in mammals.
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