Modern Biology Ch. 8 Set 2
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24 terms
Terms | Definitions |
|---|---|
 Eukaryotic chromosomes are contained within | a nucleus |
| The information needed by a cell to direct its activities and to determine its characteristics is contained in | DNA |
| How many chromosomes do human sperm and egg cells have? | 23 |
| Cells spend most of their lives in | interphase |
| Asexual reproduction occurs by | mitosis |
| During telephase | a nuclear envelope surrounds each new set of chromosomes |
| After mitosis a cytokinesis, each new cell has a | complete set of the original cell's chromosomes |
| Meiosis results in the formation of | haploid cells from diploid cells |
| chromosomes | threadlike structures made of DNA molecules that contain the genes |
| Autosomes | Any chromosome that is not a sex chromosome |
| Cells having two sets of chromosomes | diploid |
| Cells having one set of unpaired chromosomes | haploid |
| Binary fission is | prokaryotic cell division |
| Haploid cells unite to form a | diploid gamete |
| Asexual reproduction | the production of offspring from one parent |
| Prokaryotic chromosomes | consist of a circular DNA molecule |
| A chromatid is | one of two identical parts that make up a chromosome |
| Every species has | a distinctive number of chromosomes per cell |
| Mitosis | can increase the number of body cells without changing the information contained in the DNA of those cells |
| Interphase is | a time of cell growth and development |
| Cytokinesis | differs in animal and pplant cells |
| Spermatogenesis produces | four haploid cells |
| Oogenesis | requires meiotic cell divisions |
| Crossing-over occurs during | Meiosis I |
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