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Details Title: bioMINItest Description: test Total Flash Cards: 40 Created: 03/25/2004 20:43:23	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term duplicated chromosomes separate Definition Mitosis Term S Definition replication occurs during this phase Term G1 Definition first period of cell growth prior to replication Term cytokinesis Definition whole cell splits in two Term G2 Definition second period of cell growth following replication Term If you counted 36 chromosomes in the nucleus of a cell about to begin meiosis, how many chromosomes would you expect to see in the gametes produced at the end of meiosis? Definition 18 Term The sequence of development of sperm is Definition spermatogonium, spermatocyte, spermatid, sperm Term Which of the following hormones is released from the hypothalamus and stimulates release of hormones from the pituitary and thus stimulates ovulation? Definition gonadotropin releasing hormone Term Which of the following is the function of the acrosome? Definition Contains enzymes that break down the protective layers surrounding the oocyte Term Allantois Definition forms the blood vessels of the umbilical cord Term Amnion Definition forms the fluid-filled sac that surrounds and protects the developing embryo Term Chorion Definition forms the embryonic contribution to the placenta Term What percent of birth defects are caused by environmental teratogens? Definition 5% Term genome Definition the complete collection of that organisms genetic information, strung together in functional units called genes that lie along DNA's famous double helix Term The DNA molecule is composed of two handrails sugar and phosphate Definition CTGA Term DNA is packaged in chromosomes humans have 46 chromosomes onions have 16 Definition "greek for colored bodies b/c what the absorbed under a microscope. Term DNA + Protein = Definition chromatin Term chromatid Definition is one of two identical strands of chromatin that make up a chromosome in its duplicated state. Term karyotype Definition a pictorial arrangement of a full set of human chromosome Term mitosis Definition division of a cells chromosomes Term cytokinesis Definition division of cytoplasm Term interphase Definition cell simultaneously carries out its work, grows, and in preperation for cell division, duplicates its chromosomes Term mitotic phase (M phase) Definition the duplicated chromosomes separate properly and then the cell as a whole splits in two. Term the length of the cell cycle varies greatly depending on the cell Definition true Term microtubles Definition part of the cells cytoskeleton-can be compared to tent poles can shorten and lengthen.hroughout stretch the cell as a whole and physically moves the cells chromosomes around Term centrosome Definition a cellular structure that acts as an organizing center for assemebly of microtubles Term metaphase Definition the nuclear envelope has dissapeared completely, and the microtubules now attached to the cgromosomes. Term anaphase Definition genetic material divides-seperated pulled apart Term telophase Definition a return to things as they werebefore mitosis started Term gamates Definition in the haploid state (single set of chrosomes) Term egg and sperm of formed in a process called males are called: females are called: Definition gamet formation -spermatogonia -oogonia Term thickened tissue which is discharched during menstration orignated in the... Definition endometrial lining of the uterus Term The home pregnancy test is based on the detection of_________________ in a womans urine Definition HCG----human chorionic gonadotropin Term IUD Definition CONTRACEPTIVES plastic or metal inserted into the uterus which can prevent pregancy Term which of the following are the primary functions of the hormone progesterone Definition B&C lowering the levels of FSH and LH released from the pituitary AND promotes thickening of the uterine lining Term forms a jelly like barrier surrounding the oocyte after ovulation. Definition Zona Pellucida Term The structure at the tip of the sperm head which releases enzymes to digest the eggs outer protective layer Definition Acrosome Term best describes a mechanism that prevents sperm from fertilizing eggs from a differnt species? Definition Species of a specefic protein molecules on the sperm head bind only to the matching species specefic proteins on the egg cell surface Term dolly or another reproductively cloned animal is a clone of Definition an adult animal that contributed DNA to an denucleated egg. Term WHAT happens first? Definition cleavage,