Chapter 11

Helix acalibridf df

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Unformatted text preview: ###H##########@###D##F ###H## ####### C## ###Z######,###(########(########(########(%################ ################################# ########K############z###>######B#####@#######47######## #y###While the two chromosomes are attached at their centromeres, we refer to each attached chromosome as a sister chromatid #######d#######A####C#a#l#i#b#r#i#2#######@###D##F #########@###D##F ###H## ####### C## ###|######"###(n#######( #######(###############################################z################ ###################z###y## x## ###### ##$###$&##$47f47#######################z###>######B#####@#######47 ######## #v###Although centromere means "middle body", a chromosome's centromere can be located almost anywhere along the DNA double helix ########`#######A####C#a#l#i#b#r#i#.#######@###D##F #########@###D##F ### ####### C## ##########"###( #######( #######(j##############################################v### ########w############ #z######### ####### ###########;###f47########.######C#a#l#i#b#r#i######## ###############z###>######B#####@#######b47######## ####At the time it condenses, the DNA within each chromosome has already replicated, forming two DNA double helices that remain attached to each other at the centromere ########d#######A####C#a#l#i#b#r#i#2#######@###D##F #########@###D##F ###H## ####### C## ###*######"###(#######( #######(###############################################z################ ##### #z######### ####### ###########;###'47########.######C#a#l#i#b#r#i######## #############################z###y## x## ###### ##$###$&##$#47}47##################### #z######### ####### ###########;####47########.######C#a#l#i#b#r#i######## ###############z###>######B#####@####### 47######## ####The two ends of a chromosome consist of repeated nucleotide sequences called telomeres ("end body" in Greek), which are essential from chromosome stability; without telomeres, the ends of chromosomes might be removed by DNA repair enzymes, or the ends of two or more chromosomes might become connected, forming long, unwieldy structures that probably could not be distributed properly to the daughter nuclei during cell division ########d#######A####C#a#l#i#b#r#i#2#######@###D##F #########@###D##F ###H## ####### C## ###2######"###(M#######( #######(W##############################################z### ################ #z######### ####### ###########;###K47########.######C#a#l#i#b#r#i######## #####################...
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This note was uploaded on 09/28/2009 for the course BIOL 1001 taught by Professor Minor during the Spring '08 term at LSU.

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