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Mitosis Notes

7th Grade, Mitosis notes

DefinitonTerm
Takes place/occurs in human body (somatic) cells; (these are every cell except the egg or sperm). Mitosis
Chromosomes multiply and divide when the cell reproduces, producing cells that are identical to parent cell cause there's no genetic information being exchanged or rearranged. Asexual reproduction
What happens when mutation occurs? There will be a different or wrong cell being produced.
Uncoiled strands of DNA Chromatin
coiled chromatin; contains genes Chromosomes
Segments of DNA on a chromosome that codes for a certain hereditary trait Genes
One part of a duplicated chromosome Chromatid
2 chromatids are attached by what? Centromere
Specialized DNA sequence of a chromosome that links with a pair of chromatids. Centromere
Chromosome pairs that are structurally similar and contain information for same genes; ( can have different expression of information on those genes) Homologous pairs
Each body cell has how many chromosomes? 46 chromosomes
Contain all homologous pairs of chromosomes. Diploid Cells
Chromosomes (in the form of chromatin) and organelles replicate. Interphase
-Chromatin coils into chromosomes (hint: each chromosome now is made of 2 chromatids joined by a centromere) -nuclear membrane disappears -Spindle fibers form Prophase
Chromosomes move to the center of the cell( the equator) Metaphase
-Chromosomes divide and chromatids separate -Chromatids are pulled to opposite sides pulled by spindle fibers Anaphase
-Centrioles and spindle fibers disappear -Chromatids unwind back into chromatin -Nuclear membrane reforms -Cytoplasm starts to divide into 2 cells Telophase
-Cytoplasm in parent cell divides -there are now 2 daughter cells that have DNA identical to the parent cell Cytokinesis
Is Cell division a continuous cycle? Yes
Created by: 23jrobbins
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