101Prac3S06

101Prac3S06 - BI 101, Prof. Baack, Practice questions for...

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BI 101, Prof. Baack, Practice questions for lecture exam #3. Cell Cycle: Meiosis and Sexual Reproduction, Patterns of Inheritance, Genes and Proteins, Animal Development NOTE: These questions are for practice purposes and are not all inclusive with respect to material covered. 1. Homologous chromosomes a) always carry identical variants of genes d) are a set of chromosomes that the cell received from one parent b) were formed when they separated during anaphase e) do not include the sex chromosomes c) carry the same gene sequence 2. An organism has 26 chromosomes in its non-gamete cells. How many chromosomes will three of its eggs have? a) 13 b) 39 c) 78 d) 26 3. An organism has 18 chromosomes in its gamete. How many chromosomes would there be in one non-gametic cell? a) 18 b) 9 c) 36 d) 27 e) 54 4. How many chromatids does each chromosome have just prior to (before) replication? a) none b) one c) two d) four e) three 5. In what process and stage do homologous chromosomes separate? a) anaphase of mitosis b) prophase of mitosis c) anaphase II of meiosis d) prophase I of meiosis e) anaphase I of meiosis 6. Which of the following is the best description of the events of anaphase I? a) Half of the chromosomes inherited from the mother and half of the chromosomes inherited from the father go to one pole of the cell. b) All chromosomes inherited from the mother go to one pole of the cell; all chromosomes inherited from the father go to the other pole. c) Homologous chromosomes separate and migrate to opposite poles; which homologue goes to which pole is random. d) Sister chromatids separate; those inherited from the mother migrate to one pole, those inherited from the father go to the other pole. 7. Anaphase II is essentially the same as mitotic anaphase except that in anaphase II, ____________, and in mitotic anaphase _____________. a) tetrads do not form; tetrads form b) crossing over occurs; crossing over does not occur c) the cells are haploid and sister chromatids separate; the cells are diploid and homologous pairs separate d) chromosomes line up double file on the midline of the cell; chromosomes line up single file on the midline of the cell e) the cells are haploid; the cells are diploid 8. Which of the following produces recombinant chromosomes? a) fertilization b) non-disjunction c) crossing over d) replication 9. How much genetic material is present in a cell during prophase I as compared to a cell that has completed meiosis II? a) four times as much b) ¼ as much c) twice as much d) the same amount e) ½ as much 10. How does prophase I differ from prophase II? a)
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This note was uploaded on 10/25/2011 for the course ECON 2301 taught by Professor Staff during the Spring '08 term at HCCS.

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101Prac3S06 - BI 101, Prof. Baack, Practice questions for...

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