Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
SUPA12/13
| Question | Answer |
|---|---|
| Gap One | first part of interphase when cell growth and protein synthesis occurs |
| S Phase | 2nd part of interphase when DNA replication occurs |
| nucleotide | basic unit of DNA |
| bonds between nitrogenous bases | hydrogen |
| base pairing | adenine with thymine, cytosine with guanine |
| chromatids | strands of chromosomes |
| chromatin | diffuse form of chromosomes during interphase |
| histone | packaging protein for DNA |
| homologue | a member of a chromosome pair |
| diploid | having two copies of chromosomes |
| monoploid | haploid |
| Gap 2 | 3rd phase of interphase when tubulin is made |
| prophase | chromosomes condense, spindle is made, nuclear membrane disappears, chromosomes attach to spindle |
| tubulin | composes spindle fibers |
| kinetochore | part of the centromere where the spindle attaches |
| metaphase | chromosomes line up along the center of the cell |
| anaphase | centromeres divide, chromosomes move to opposite sides of cell |
| telophase | spindle gone, nuclear membranes form, cell division |
| cytokinesis | cell division |
| animal cell division | cell pinched along cleavage furrow |
| plant cell division | vesicles fuse to form cell plate |
| meiosis | creates haploid sperm or egg |
| gonads | place of meiosis |
| crossing over | when homologous chromosomes exchange information; increases variation |
| brachiolaria | 2nd larval stage of starfish |
| bipinnaria | 1st larval stage of starfish |
| parts of a fertilized frog egg | animal hemisphere, vegetal hemisphere, gray crescent |
| blastocoel | cavity in the blastula |
| archenteron | central cavity of the gastrula |
| blastopore | opening into the archenteron |
| cleavage | a series of rapid mitotic divisions in an embryo |
| morula | 32 cell stage of embryonic devlopment |
| blastodisc | actual cytoplasm which develops into an embryo in birds and reptiles |
| order of development | zygote, early cleavage stages, morula, blastula, gastrula |
| gray crescent | region in amphibian zygote important in development |
| germ layers | embryonic tissue layera |
| endoderm | innermost germ layer becomes linings of digestive tube |
| mesoderm | middle layer becomes notochord, bone, muscles, circulatory system, excretory system, repro. system |
| ectoderm | outermost layer; becomes nervous system, outer skin layer, |
| primitive streak | thickened cellular region in bird embryos |
| somites | in bird embryos, blocks of mesoderm that develop into vertebrae |
| amnion | encloses embryo in fluid-filled amniotic cavity |
| chorion | outer membrane in bird eggs |
| umbilical cord | connect placental embryos to placenta |
| thalidomide | mild sedative in 1950's Europe causing problems in embryonic limb formation |
| rubella | German measles; causes birth defects during first 3 months of pregnancy |
| achondroplasia | dwarfism (hereditary) |
| Down Syndrome | extra 21st chromosome; mental impairment |
| amniocentesis | needle used to retrieve sample fetal cells for analysis |
| morphogenesis | movement of cells and organization into body tissues |
| cell differentiation | process by which cells become specialized |
| Hans Spemann | showed the importance nucleus in embryonic development |
| Briggs and King | showed that nucleus from any blastula cell supports normal embryonic development; importance of gray crescent in amphibian development |
| Holtfreter | experiment suggested that ectoderm relies on position within the gastrula to develop |
| dorsal lip of blastopore (chordamesoderm) | organizer during embryonic development |
Created by:
gaffney
Popular Biology sets