Term
| duplicated chromosomes separate |
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Definition
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Definition
| replication occurs during this phase |
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Definition
| first period of cell growth prior to replication |
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Definition
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Definition
| second period of cell growth following replication |
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| 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? |
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Definition
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Term
| The sequence of development of sperm is |
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Definition
| spermatogonium, spermatocyte, spermatid, sperm |
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Term
| Which of the following hormones is released from the hypothalamus and stimulates release of hormones from the pituitary and thus stimulates ovulation? |
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Definition
| gonadotropin releasing hormone |
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Term
| Which of the following is the function of the acrosome? |
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Definition
| Contains enzymes that break down the protective layers surrounding the oocyte |
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Definition
| forms the blood vessels of the umbilical cord |
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Definition
| forms the fluid-filled sac that surrounds and protects the developing embryo |
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Definition
| forms the embryonic contribution to the placenta |
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| What percent of birth defects are caused by environmental teratogens? |
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Definition
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Definition
| the complete collection of that organisms genetic information, strung together in functional units called genes that lie along DNA's famous double helix |
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Term
| The DNA molecule is composed of two handrails sugar and phosphate |
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Definition
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Term
DNA is packaged in chromosomes
humans have 46 chromosomes
onions have 16 |
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Definition
| "greek for colored bodies b/c what the absorbed under a microscope. |
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Term
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Definition
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Definition
| is one of two identical strands of chromatin that make up a chromosome in its duplicated state. |
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Term
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Definition
| a pictorial arrangement of a full set of human chromosome |
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Term
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Definition
| division of a cells chromosomes |
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Definition
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Term
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Definition
| cell simultaneously carries out its work, grows, and in preperation for cell division, duplicates its chromosomes |
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Definition
| the duplicated chromosomes separate properly and then the cell as a whole splits in two. |
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Term
| the length of the cell cycle varies greatly depending on the cell |
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Definition
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Term
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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 |
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Term
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Definition
| a cellular structure that acts as an organizing center for assemebly of microtubles |
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Term
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Definition
| the nuclear envelope has dissapeared completely, and the microtubules now attached to the cgromosomes. |
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Term
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Definition
| genetic material divides-seperated pulled apart |
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Term
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Definition
| a return to things as they werebefore mitosis started |
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Term
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Definition
| in the haploid state (single set of chrosomes) |
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Term
egg and sperm of formed in a process called
males are called:
females are called: |
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Definition
gamet formation
-spermatogonia
-oogonia |
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Term
| thickened tissue which is discharched during menstration orignated in the... |
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Definition
| endometrial lining of the uterus |
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Term
| The home pregnancy test is based on the detection of_________________ in a womans urine |
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Definition
| HCG----human chorionic gonadotropin |
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Term
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Definition
| CONTRACEPTIVES plastic or metal inserted into the uterus which can prevent pregancy |
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Term
| which of the following are the primary functions of the hormone progesterone |
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Definition
| B&C lowering the levels of FSH and LH released from the pituitary AND promotes thickening of the uterine lining |
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Term
| forms a jelly like barrier surrounding the oocyte after ovulation. |
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Definition
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Term
| The structure at the tip of the sperm head which releases enzymes to digest the eggs outer protective layer |
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Definition
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Term
| best describes a mechanism that prevents sperm from fertilizing eggs from a differnt species? |
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Definition
| Species of a specefic protein molecules on the sperm head bind only to the matching species specefic proteins on the egg cell surface |
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Term
| dolly or another reproductively cloned animal is a clone of |
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Definition
| an adult animal that contributed DNA to an denucleated egg. |
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