19 what are the three sources of genetic variation

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19. What are the three sources of genetic variation among offspring? 20. Draw a diagram of oogenesis next to a diagram of spermatogenesis. Label the cells.
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AP Biology 2 21. Describe how the process of meiosis in oogenesis differs from the process of meiosis in spermatogenesis. How do the differences explain why all mitochondrial DNA is inherited from your mother? Past Free Response Questions 1980 : Describe in detail the process of meiosis as it occurs in an organism with a diploid chromosome number of 4 (2n=4). Include labeled diagrams in your discussion. Indicate when and how each of the following occurs in meiosis: a. Crossing over b. Nondisjunction 1987: Discuss the process of cell division in animals. Include a description of mitosis and cytokinesis, and of the other phases of the cell cycle. Do not include meiosis. 1996: An organism is heterozygous at two genetic loci on different chromosomes. | | | | | | --| --| | | | | --| --| | | a) Explain how these alleles are transmitted by the process of mitosis to daughter cells. b) Explain how these alleles are distributed by the process of meiosis to gametes. c) Explain how the behavior of these two pairs of homologous chromosomes during meiosis provides the physical basis for Mendel's two laws of inheritance. Labeled diagrams that are explained in your answer may be useful. 2000 : Information transfer is fundamental to all living organisms. For two of the following examples, explain in detail how the transfer of information is accomplished: a) The genetic material in one eukaryotic cell is copied and distributed to two identical daughter cells.
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