Biology-Meoisis
Terms
undefined, object
copy deck
- Diploid
- a cell that contains both sets of homologous chromosomes
- homologous
- each of the 4 chromosomes from the male parent has a corresponding chromosome from the female parent
- Haploid
- one let of genes
- Meiosis
- a process of reduction division in which the number of chromoseomes per cell is cut in half through the spearation of homologous chromosomes in a diploid cell
- Interphase I
- cells undergo a round of DNA replication froming duplicate chromosomes
- Phrophase I
- each chromosome pairs with its corresponding homolgous chromosome to form a tetrad
- Tetrad
- structure containing four chromatids
- Metaphase I
- spindle fibers attach to the chromosomes
- Anaphase I
- the fibers pull homologous chromosomes toward opposite ends of the cell
- Telophase I and Cytokinesis
- Nuclear membranes form, The cell separates into two cells
- Prophase II
- Meiosis I results intwo haplid daughter cells, each with half the number of chromosomes as the original cell
- Metaphase II
- The chromosomes line up in a similar way to metaphase in mitosis
- Anaphase II
- the sister chromatids separate and move toward opposite ends of the cell
- Telophase II and Cytokinesis
- Meiosis II results in four haploid (N) daughet cells
- Croosing-Over
- chromosones exchanging portions of their chromatids and produces new combinations of alleles
- Polar Bodies
- the remaing three cells that are produced but dont turn into eggs
- Difference Between Meiosis and Mitosis
- Mitosis results in the production fo two genetically identical diploid cells, whereas meiosis produces four genetically different haploid cells