CH_9 - CH 9 1 When a DNA molecule doubles a chromosome is then made up of two joined Answer chromatids 2 Prokaryotic DNA molecules are packaged by

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CH 9 1. When a DNA molecule doubles, a chromosome is then made up of two joined _______. Answer: chromatids 2. Prokaryotic DNA molecules are packaged by _______ proteins, which associate with DNA. Answer: basic 3. In general, the division of the cell, called _______, follows immediately upon mitosis. Answer: cytokinesis 4. Bacteria have a short sequence called _______, where DNA synthesis begins. Answer: ori 5. Bacteria have a short sequence called _______, where DNA synthesis ends. Answer: ter 6. During prophase I of meiosis, a unique event occurs that results in the formation of recombinant chromosomes. This event is termed _______. Answer: crossing over 7. The structure present during mitosis that is composed of two identical DNA molecules complexed with proteins and joined at the centromere is called a _______. Answer: chromosome 8. The stage of the cell cycle during which DNA replicates is called the _______. Answer: S phase 9. _______ is the fusion of two gametes. Answer: Fertilization 10. During prometaphase, the chromatids are held together by _______. Answer: cohesion 11. Occasionally, a homologous chromosome pair fails to separate during anaphase I of meiosis. One of the resulting cells lacks a copy of this chromosome, whereas the other contains both members of the homologous pair. These cells are called _______ cells. Answer: aneuploid 12. During a process known as _______, a piece of one chromosome can break off and become joined to a different chromosome. Answer: translocation
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process known as _______. Answer: fission 14. A cell with three homologous sets of chromosomes is called a _______ cell. Answer: triploid 15. The heritable information of the cell is _______. Answer: DNA 16. The process that ensures that genetic information is passed on to a cell’s daughter cells is _______. Answer: mitosis 17. The process that ensures that only one of each pair of chromosomes is included in a gamete is _______. Answer: meiosis 18. The main role of nucleosomes in eukaryotic cells is to _______ the DNA. Answer: package 19. The G2 phase always follows _______ phase. Answer: S 20. The G in G1 and G2 is short for _______. Answer: gap 21. The chromatin _______ during prophase. Answer: condenses 22. The milestone event that defines entry into prometaphase is _______. Answer: loss of the nuclear envelope 23. In plants, a _______ forms at the equatorial region of the cell. Answer: cell plate 24. The cell plate is derived from the _______ of the cell. Answer: Golgi apparatus 25. The “invisible thread” that pinches cells apart during cell division is made of _______ and _______. Answer: actin; myosin
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This note was uploaded on 11/29/2011 for the course BIOLOGY BIO 187 taught by Professor Capco during the Spring '11 term at ASU.

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CH_9 - CH 9 1 When a DNA molecule doubles a chromosome is then made up of two joined Answer chromatids 2 Prokaryotic DNA molecules are packaged by

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