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Cell Repr.oduction
Mitosis and Meosis
| Question | Answer |
|---|---|
| Mitotic Spindle | equally divides chromotids |
| Prophase | 1st phase of mitosis,nuclear enevelope breaks down |
| Interphase | time between cell divisions, longest part of cell cycle,(includes: G1,S,G2) |
| G1 Phase | 1st phase of interphase, cell makes more cytoplasm and organelles, controls when cell divides |
| Cleavage Furrow | divides animal cell into 2 offspring |
| S phase | DNA is copied, (part of interphase) |
| Anaphase | 3rd phase of mitosis, chromosomes move to opposite poles |
| asexual reproduction | production of offspring from 1 parent |
| Chromatids | 2 copies of DNA on each chromosome, form before cell division |
| Centromere | attaches 2 chromatids |
| Homologus Chromosomes | similar in shape and size, have simliar genetic info. |
| Diploid | cell that contains 2 sets of chromosomes |
| Haploid | cell that contains 1 set of chromosomes (ex.human sex cells, 23) |
| Prophase I | phase of meiosis, crossing over occurs |
| Cancer | misregulation of proteins that control cell growth and division |
| First Growth (G1) | cell grows and casrries out functions |
| Mitosis Check Point | Triggers exit from mitosis |
| Second Growth (G2) | prep. for nucleus to divide |
| G1-S-G2-Mitosis-Cytokenisis ...represents | the cell cycle |
| The S is the phase in which... | DNA synthesized (copied) |
| Phases G1,S,G2, are called... | interphase |
| Spindle Fibers are made of... | Microtubles- move chromosomes apart & cleavage furrows |
| Disease caused by uncontrolled cell division... | cancer |
| In the first stage of binary fission DNA is... | copied |
| Karyotypes | chromosomes present in a humans cells |
| During which phase of meiosis do tetrads form? | prophase I |
| Division of cytoplasm in a eukaryotic cell is... | cytokensis |
| What occurs during synapsis? | paring of homologues |
| During Mitosis and Meiosis kinetochore fibers are thought to? | move chromosomes |
| Histones are protiens that... | aid in the packing of DNA in eukaryotic cells |
| Spermatogenesis results in | 4 haploid sperm cells |
| Each offspring cell produced by binary fision contains | identical copy of original cells chromosomes |
| Crossing over results in genetic recombination by | permiting the exchange of genetic material b/t maternal and paternal chromosomes |
| What structure not found in animal cells forms along the midline of a dividing plant cell? | Cell plate |
| Describe how you could tell if a diividng cell is prkaryote or eukaryote? | in Eu. look for centriole,nucleus,chromosome, in Pr.circular molecule of DNA |
| 2 ways that meiosis differs from mitosis... | meiosis results in hapolid cells, cells produced in meiosis differ genitically from original cell |
| Independent Assorment? and how does it affect genetic makeup of offspring? | random seperation of homolugus chromosomes, genetic variation |
| describe the role that spindle fibers play in mitosis... | splits chromosomes for cell division |
| Advantage of sexual reproduction? | changes characteristics,allows species to adapt rapidly |
| Compare process of spermatogenisis to oogensis? | both produce gametes, s. occurs in males, o. occurs in females,s. results in 4 haploid cells, o. results in 1 hapolid ovum and 3 polar bodies which eventually die |
| Describe the difference b/t cytokinesis in animal cells and plant cells? | animal cells have no cell wall and split using cleavage furrow, in plant cells the golgi appratrus that form a cell plate and split the cell |
| Describe structure of chromosome | rod shaped structures made of DNA and protiens |
Created by:
dabears
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