Lecture Notes for BIOL 100 - Principles of Biology with Martin at Kansas (KU)

Notes Information

Material Type:Note
Class:BIOL 100 - Principles of Biology
University:University of Kansas
Term:Fall 2010
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12/12/2010 10:54:00 PM Human Somatic Cells (2N) have 46 chromosomes Two of each Number, one from mother and one from father. . Only 23 different chromosomes. Numbered #1-23. Ex. Two #19?s. These 2 chromosomes are called a Homologous pair of chromosomes. 23 PAIRS OF CHROMOSOMES. Typical chromosomes have about 1,000 genes. Duplicated Chromosomes: ex.) 19 and a COPY of 19. Sperms and eggs only have 1 of each of the 23 chromosomes. (some from mother and some from father.) 46 chromosomes in the body: called chromosome number . Smallest chromosome number: some ants Disadvantage: Not enough room for genes. of 2. Smallest chromosome number known. Sex cells have a single chromosome. Maximum chromosome number: Ophioglossum has 2N= 2,160 Disadvantage: how are you going to copy all these things? Duplicating them can result in mutations. Very few organsims have a chromosome number this high. Too difficult to copy this many chromosomes correctly. Ha...
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