BSC 2010C Chapter Notes - Chapter 12&13: Maturation Promoting Factor, Sister Chromatids, Cell Membrane
Document Summary
12 and 13: cellular basis of reproduction and inheritance. Genes carried on single circular dna molecule: up to 500x cell length. Complexed with few proteins and attached to plasma membrane at one point. Copies attached to adjacent parts of membrane. Cell elongation and new plasma membrane separates two genomes. Just prior to division, chromosomes become visible. Somatic cells are body cells (not sex cells) These cells need to contain the full set of chromosomes so that all the directions for functions and activities of the cell can be carried out. Normally you inherit 23 chromosomes from each of your parents. This complete set of chromosomes (46) is known as the diploid number in. These cells have half of the number of chromosomes that a body cell would have. Sooooosomatic (body) cells contain the diploid number of chromosomes compared to sex cells (haploid number) Prior to cell division, chromosomes are duplicated.
