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UNIT 3, CHPT 9

CHAPTER 9.1

QuestionAnswer
what is a genome?` genetic material of an organism/virus
what are chromosomes? cellular structures consisting of one DNA molecule and it's associated protein molecules
what are chromatins? complexes of DNA and protein
what are somatic cells? body cells
what are gametes? sperm/egg cells
what are sister chromatids? two copies of a duplicated chromosome, attached to each other at the centromere. (two make up one chromosome)
what are cohesions? protein complexes that hold sister chromatids together
what is a centromere? region on each sister chromatid where it is most closely attached to it's sister chromatid
what are sister chromatids once they seperate? they are now considered individual chromosomes
what is mitosis? growth, development, and repair of cells. creates genetically IDENTICAL cells. (used in somatic cells)
what is cytokinesis? division of cytoplasm. (happens at the end in BOTH mitosis and meiosis)
when meiosis occurs, how many chromosomes are in a gamete? 23 chromosomes, one set
how many chromosomes are in two fertilized and fused gametes? 46 chromosomes, two sets
Created by: SuperBugLover
 

 



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