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17 Cards in this Set

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totipotent
cells having the ability to become any type of body cell
3 germ layers and what they'll become
ectoderm - skin, neurons, meso, muscle, endo - gut
pleuripotent
ability of cells of a certain germ layer to become one of many types of cells in that track.
determined
cell fate limited to one type
differentiation
gene expression that causes the cell to do its unique role
gastrulation
rearrangement of the cells to form 3 germ layers
neurulation
part of the ectoderm becomes thickened and becomes comitted to forming the N.S.
Primitive groove
central furrow in the primitive streak
Hensen's node
cluster of cells in groove through which cells pass to become endoderm and mesoderm
notochord
induces formation of neural plate
3 signal/receptor pairs in urchin fertilization
Resact gradient, Jelly Coat Factor, binding from inside acrosome and fertilizin
2 blocks to urchin polyspermy
slow: cortical granules fuse, release enzymes that cleave fertilizin and form fertilization envelope
fast: instant fertilizin binds binding, Na+ channels open, changing membrane potentioal which changes conformation of fertilizin to non binding.
"non-disjunction"
when 2 homologs don't seperate and go to the same daughter cell; results in aneuploidy
aneuploidy - what is it, when is it fatal?
missing or extra chromosomes,always fatal except in sex chromosomes and 21 (down's)
What are the PCR analogs of in vivo dna replication?
DNA Pol - Taq DNA pol
Primase - Actual Primers
Helicase - Heat
Nucleotides & ATP - DNTP's
What blood type is the universal donor
O-
What blood type is the universal acceptor?
AB+