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LINKS to more puzzles: Chapter 1 Chapter 2a Chapter 2b Chapter 3a Chapter 3B Chapter 4a Chapter 4b Chapter 5A |
LINKS to related sites: aCross Development home page: Tosney home page Society for Developmental Biology Gilbert’s textbook home page Sinauer |
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1 something cells do not do during cleavage 5 abbreviation for a two-subunit phosphoprotein that induces progesterone and allows oocyte nuclei to resume their divisions and cleave 8 layer, as in an animal ___ of cells in an urchin blastula 11 the speed of cell divisions in early cleavage is relatively _ _ _id and cells divide more _ _ _idly than in any cancer; however, the speed of cleavage varies with the amount of yolk and it is most _ _ _id when yolk is sparse 12 in i_ _lecithal eggs, the yolk that is present is evenly distributed 13 in an ___ pregnancy, the embryo implants in the oviduct 14 new cleavage furrows can be created experimentally by displacing these 16 cleavage pa_ _erns are controlled by 1) the amount and distribution of yolk and 2) stored materials that influence the timing and position of furrows 17 cavity 18 ___ cells in fish embryos at the midblastula transition stage are undetermined cells that will give rise to the embryo proper 20 in mammalian embryos, _ _ _ _herin is a cell adhesion molecule that is expressed evenly during the 2-cell stage, but it is restricted to cell-cell contact sites during compaction 23 fodder 25 cytosta_ _ _ factor is a protein produced during frog oocyte development which keeps the oocytes arrested in metaphase of the second meiotic division 27 transcription initiation can be induced prematurely in frogs and flies by artificially making the cell cyle lo_g_r 28 if you tie off (_____) cytoplasm during cleavage, you will accelerate the mitotic pattern in insect eggs 29 the blasto_ _st is the blastocoel of the mammalian embryo 30 the env_ _ _ _ing layer is the superficial, single-cell layer of blastoderm cells which will later form the periderm in cleaving fish embryos 33 ro_ _tional cleavage is typical of mammals 34 the _ _iblast is the upper layer of cells in a blastoderm formed during discoidal cleavage 36 the ____ ring is composed of microfilaments made of actin that act as the mechanical agent of cytokinesis 39 a poly_ _rm is a mass of undifferentiated cells formed in the holoblastically cleaving egg of a parasitic wasp 41 stryp_ _n is a protease on the cell membrane that lyses a hole in the zona pellucida, allowing the mammalian embryo to squeeze out and hatch 42 possessive, male 43 po_ _ _mbryony is the ability of an egg to develop into a mass of cells that routinely forms numerous embryos 45 all cells of the mouse ___ cell mass can give rise to all cell types of the embryo, but not to the trophoblast; they form an equivalence group 48 three vowels, with one duplicate 49 the animal or vegetal po_ _ 50 the brood pouch and mantle of the unionid clam Lampsilis ventricosa will look like a f_ _ _ 51 double letter 52 in _ _ _erfici_l cleavage, the centrally located yolk permits cleavage only along the peripheral rim of the egg 54 the _ _ _germinal cavity is the space between the blastoderm and yolk in discoidally cleaving embryos such as birds 55 the s_ _ _ytial blastoderm, in eggs with superficial cleavage, is the stage when the nuclei have migrated to the periphery but are still contained within a common cytoplasm 60 the blasto_ _ _ _ is the region of active cytoplasm at the animal pole of eggs that undergo _ _ _ _oidal cleavage, such as in birds 62 k_ _ _ _ _ _ _ _ _ _ _ is the mitotic division of the nucleus; it is separable from cytokinesis, the division of the cell 68 source of sperm 69 individuals with these two genetic cell types, both male and female, are probably natural chimeras 70 in ___ cleavage, cell division is limited by the large yolk volume to a small disc of yolk-free cytoplasm atop a mound of yolk |
1 in an equivalence _ _ _up, the cells have equal potency 2 _ _dial cleavage is typical of echinoderms 3 the area ___ is the peripheral ring of blastoderm cells during discoidal cleavage, as in bird eggs 4 the blasto_ _ _ _ in amphibian embryos is a cavity that will permit cell migration during gastrulation 5 _ _ _ _meres are blastomeres formed in the anterior half during cleavage in the urchin embryo 6 politically correct 7 a flourescent dye can be injected into cells to trace their _a_ _ and lineage 8 paper found in bathrooms, abbrev 9 eye, eye 10 an _ _ _o_ _ _ (tubal) pregnancy can caused lethal hemorrhage 12 embryonic _ _ _m cells are inner cell mass cells isolated in culture under conditions that keep them dividing and undifferentiated 15 dirt with grass 18 a flourescent ___ can be injected into cells to trace their fate and lineage 19 the veg_ _al pole is the yolk-rich pole of the egg, zygote and cleaving embryo 20 nuclei and their associated cytoplasmic islands formed in the cellular blastoderm in eggs with superficial cleavage 21 in eggs with superficial cleavage, the _ _ _lular blastoderm is the stage when the nuclei that have migrated to the periphery have become partitioned off by oocyte membrane 22 _ _zygotic twins arise from two eggs 23 the ___ enzyme is secreted by vegetal cells to digest the fertilization membrane in sea urchins 24 c_vi_ _ _ _ _ _ is a hollowing out, as during blastula formation in the mammalian blastula 26 the cell ___ becomes longer as cleavage progresses 28 very roughly, the number of cells in an embryo after cleavage 31 the zyg_ti_ genome does not function in most early cleavage embryos 32 ___ cells are set aside early in insect cleavage, and will form the germ cells of the adult 34 end in an F for mythical people 35 the area ___ is the region that is only a single cell thick in the center of the blastoderm during discoidal cleavage, as in bird eggs 37 dextral 38 _ _ _lecithal eggs have little yolk 40 in c_ _trollecithal eggs, yolk is concentrated in the center, as in most arthropods 44 affirmative, slang 46 grab, catch, snatch 47 a chime_ _ _ embryo results from the aggregation of 2 or more early cleavage embryos to form a composite embryo 52 first day of the week, without vowels 53 letter code for the four large macromeres produced in early mollusc cleavage 56 furry animal or a TV channel or an X-files star 57 the _ _ _blastula transition is the period in cleavage characterized by a slowdown of nuclear division and a concomitant increase in RNA transcription 58 affirmative 59 _ _cr_meres are blastomeres formed at the vegetal pole during cleavage in the urchin embryo. 61 add a T for sodium chloride 62 add an E to cut wood 63 prescription, abbrev 64 why? why? 65 mo_ozygot_c twins arise from a single egg 66 southern state, abbrev 67 yes, foreign TOP |
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