HSCI 216 Lecture Notes - Lecture 2: Somatic Cell, Prophase, Metaphase
19 Oct 2015
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Lecture 2 reading: understand concepts, and logical facts. exam: multiple choice, 40-45 questions. Preliminary definition: a change in the collective information contained in a population"s genetic makeup. start with a population with some information on one generation, you move to the next generation and something changed. that, in biology is called evolution. Heredity: transmission of information from one generation to the next. Dna and rna encode genetic material: chain of life. 46 single stranded (known as chromatids) chromosomes are replicated to be double stranded, cell division occurs and 2 daughter cells with 48 chromosomes are the result. this is mitosis. Each pair of chromosome pairs will go to each daughter cells and you have reduction division where you are left with 2 cells with 23 chromosomes each. 2nd cell division where the two chromatids separate into single cells which leaves you with 4 daughter cells, this is meiosis. These cells are haploid and they are gametes.
