BIOL 180 Lecture Notes - Lecture 9: Sister Chromatids, Dna Replication, Meiosis
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1). If the diploid chromosome number of an organism is 2N=12, how many chromosomes will be found in this organism's sperm?
a). | 6 replicated chromosomes |
b). | 12 replicated chromosomes |
c). | 6 unreplicated chromosomes |
d). | 12 unreplicated chromosomes |
2). When do homologous chromosomes segregate into two different daughter cells?
3). When do sister chromatids segregate into two different daughter cells? (Choose ALL correct answers)
4). When does crossing over (the formation of chiasmata) occur?
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1. only one chromosome of a homologous pair is present in a cell 2. sister chromatids seperate 3. homologous chromosomes pair up 4. parent cell and daughter cells are genetically identical to each other 5. chromosomes replicate before nuclear division 6. crossing over 7. involved in growth and repair 8. homologous chromosomes separate 9. synthesis of sister chromatids before division 10. independent assortment | Answer Choices: A. occurs ONLY in meiosis B. occurs in BOTH mitosis and meiosis C. occurs ONLY in mitosis |