01:119:115 Lecture Notes - Lecture 10: Eukaryote, Characteristic Class, Cell Nucleus

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All living things are made of cells. Cells are the smallest units of life. Cells come only from other cells by cell division. Only way to make more cells is from cd. Tissue renewal - injury occurs but the skin heals over time: genetic material of the cell. Genome - all dna in a cell (gene instructions) Prokaryotic cells - single circular dna molecules. Dna molecules in a cell are packaged into chromosomes. Eukaryotic chromosomes consist of chromatin ( dna + proteins ) The chromatin condenses during cell division dna wound around histone proteins into nucleosomes: chromosome number. Every living thing has a different amount of different number of each genome. Every eukaryotic species has a characteristic number of chromosomes in each cell nucleus. Haploid cell (n) - 1 copy of each chromosome. Diploid cell (2n) - 2 sets of each chromosome. One from mom and one from dad.

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