BIOS 10161 Lecture Notes - Lecture 24: One Laptop Per Child, Sister Chromatids, Dna Replication
18 Nov 2016
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Document Summary
First human cells to be grown in the lab came from a woman with cervical cancer in 1951 (henrietta lack -hela) The cells grew so well and are so robust and they are still used in research today. Actually not a lot of laws surrounding this issue. Hela cells work so well because cancer cells with divide indefinitely and are pretty much immortal. The life cycle of an organism is linked to cell division: unicellular organisms use cell division primary for reproduction. In multicellular organisms, cell division is important in growth and repair of tissues. Eukaryotes: signals for cell division are related to the needs of the entire organism, many cells in multicellular organisms become specialized and seldom divide, eukaryotes usually have many chromosomes; replication and segregations are more intricate. Not binary fission to simple for the all the chromosomes multicellular organisms have: dna replication usually occurs between cell divisions (limited to specific stage)
