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Mitosis & Meiosis I
| Question | Answer |
|---|---|
| What is mitosis? | Part of a euaryotic cell division during which the cell nucleus divides |
| How stages are in mitosis? | 4 -Prophase -Metapase -Anaphase -Telophase |
| What is prophase? | Prophase is where the nuclear envolope of the cell has ditieriorated, at chormosomes have become visable, and the spindle apparatua has become visable |
| What is telophase? | The chromosomes cluster together, and a nuclear envolope re-appears around them. The spindle breaks apart, and a nucleolous becomes visable in each nucleus |
| What is interphase? | Cell grows and replicaes DNA & centrioles |
| What is metaphase? | Chromosomes line up across the middle of the cell. Each chromosome is attached to a spindle fiber through it's centromere |
| What is anaphase? | Sister chromosomes sperate into individual chromosomes and seperate |
| What is cytokinesis? | In a animal cell, after telophase the cell would pinch into two daughter cells, and in a plant cell, a cell plate is formed creating two new daughter cells |
| What is meiosis? | Process in which number of chromosomes per cell is cut in half, through the seperation of homologous chromosomes in a diploid cell |
| What are the stages of meiosis? | Meiosis I & meiosis II |
| What is meiosis I? | A series of events that result in the production of two diploid cells |
| What is the process of meiosis I? | -Prophase I -Metephase I -Anaphase I -Telophase I & Cyotokinesis |
| What is prophase I | During prophase I, each replicated chromosome pairs with it's homologous match. Which forms a tetrad. Also, tetrads cross-over |
| What is anaphase I | During anaphase I, spindle fibers pull each pair toword opposite poles |
| What is telophase I & Cytokinesis? | A nuclear membrane forms around the chromosomes again, and then two diploid cells are created |
| What is metaphase I? | During metaphase, the tetrads line up across the center of the cell |
| What is a tetrad? | A structure that contains four cromatids |
| What is crossing-over? | Tetrads exchange portions of there cromatids |
| What is a diploid cell? | Cell with two sets of homologous DNA |
| What is a haploid cell? | Cell with four sets of homologous DNA |
| What is meiosis II? | Second meiotic division, d=creating four haploid cells |
| Prophase II | Each cells DNA becomes visable |
| Metaphase II | Each cells DNA lines up across the center of the cell |
| Anaphase II | Homologous pairs seperate at centromeres and are pulled to opposite poles |
| Telophase II & Cytokinesis | Nucleus envolope re-appears and four haploid cells are created |
| What is a gamete? | A gamete is a haploid cell, also known as a sperm or egg/sex cell |
Created by:
Gintner47
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