Cell Division
Cell Division Questions to consider… Where? Why? How?
Cell Division Eukaryotic cells utilize two types of cell division: mitosis meiosis Meiosis in sexual reproduction. Mitosis in everything else
Why Divide? To replace dead or dying cell To produce more cells to enlarge the organism Reproduction
Binary Fission asexual reproduction used by most prokaryotes and protists Results in the reproduction of a livingcellby division into two equal or near-equal parts.
BINARY FISSION
SUMMARY OF MITOSIS PARENT CELL GROWTH 7
SUMMARY OF WHAT THE DNA DOES DURING MITOSIS 8
DNA in Mitosis Chromosome duplication Sister Centromere chromatids distribution to daughter cells
DNA Replication during Mitosis DNA genes CHROMOSOME Count number of CENTROMERES Sister chromatids: copied chromosomes attached at centromere
DNA Replication during Mitosis KARYOTYPE: picture of chromsomes arranged into pairs Humans have 23 pairs (46 total) chromosomes http://en.wikipedia.org/wiki/List_of_number_of_chromosomes_of_various_organisms
DNA Replication The Watson-Crick model of DNA structure suggested a mechanism for its replication DNA strands separate Enzymes use each strand as a template to assemble new nucleotides into complementary strands Parental molecule of DNA Both parental strands serve as templates Two identical daughter molecules T Nucleotides C G A