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Cards In This Set
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Fertilization of the secondary oocyte normally occurs in the
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Uterine tube
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The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the
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Trophoblast
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Embryogenesis refers to the same period of time as
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Prenatal period, gestation period, pregnancy
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Under normal conditions, how many of the 4 spermatozoa produced from each spermatocyte contain a Y chromosome?
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2
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Crossing over is the process by which
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Homologous chromosomes trade parts during meiosis, genes can be shuffled even before fertilization occurs, one chromosome can combine genes from both parents
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The 2nd week of development can be characterized as the "period of two's" b/c
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A 2 layered germinal disc forms, and from it, 2 extraembryonic cavities, the placenta begins to develop from 2 components that merge
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The placenta provides services for the fetus that will eventually be performes by which of the organ systems?
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Digestive, respiratory, urinary
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In the blastocyst, the fluid filled chamber that separates the bilaminar germinal disc from the trophoblast is the
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Amniotic cavity
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The invagination or migration of cells from the epiblast into the space btwn it and the hypoblast marks the beginning of
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Gastrulation
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The umbilical cord comprises of what?
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Connecting stalk, umbilical vessels, and allantois
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Fetal metabolic wastes are eliminated by transfer to the
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Maternal blood
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Which would be the most likely consequence of a genetic defect that prevented the placenta from producing hormones?
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Miscarriage as soon as the corpus luteum ceases to function
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Amniocentesis is most often performed during which month of pregnancy?
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4th month
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Fetal alcohol syndrome and congenital syphilis share what etiological aspect?
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Both are acquired from the mother across the placental barrier
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Teraogens would be most likely to cause which type of congenital anomalies?
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Malformations
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