1. Click to edit Master title style Click to edit Master subtitle style CLICKER QUESTIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson © 2011 Pearson Education, Inc. Meiosis and Sexual Life Cycles Chapter 13 Questions prepared by Louise Paquin McDaniel College

2. Overview Which of the following transmits genes from one generation of a family to another? a)DNA b)gametes c)somatic cells d)mitosis e)nucleotides © 2011 Pearson Education, Inc.

3. Fertilization Fertilization is to zygote as meiosis is to which of the following? a)mitosis b)diploid c)chromosome d)replication e)gamete

4. © 2011 Pearson Education, Inc. Chromosome Number Privet shrubs and humans each have a diploid number of 46 chromosomes per cell. Why are the two species so dissimilar? a)Privet chromosomes undergo only mitosis. b)Privet chromosomes are shaped differently. c)Human chromosomes have genes grouped together differently. d)The two species have appreciably different genes. e)Privets do not have sex chromosomes.

5. © 2011 Pearson Education, Inc. Karyotypes Why is it more practical to prepare karyotypes by viewing somatic diploid cells rather than haploid gametes?

6. © 2011 Pearson Education, Inc. Meiosis Diploid cells may undergo either mitosis or meiosis. Can haploid cells? Why or why not?

7. © 2011 Pearson Education, Inc. Inquiry Shugoshin is a protein that protects cohesins from cleavage during meiosis I. What would you expect would occur if a premeiotic cell had one normal copy and one abnormal (nonfunctional) copy of the shugoshin gene? Hint: Think of one form on each member of a homologous pair.

8. © 2011 Pearson Education, Inc. Independent Assortment How and at what stage do chromosomes undergo independent assortment? a)meiosis I pairing of homologs b)anaphase I separation of homologs c)meiosis II separation of homologs d)meiosis I metaphase alignment e)meiosis I telophase separation

9. © 2011 Pearson Education, Inc. Disjunction What allows sister chromatids to separate in which phase of meiosis? a)release of cohesin along sister chromatid arms in anaphase I b)crossing over of chromatids in prophase I c)release of cohesin at centromeres in anaphase I d)release of cohesin at centromeres in anaphase II e)crossing over of homologues in prophase I

10. © 2011 Pearson Education, Inc. Variation What are three ways in which gametes from one individual diploid cell can be different from one another?

11. © 2011 Pearson Education, Inc. Rate and Process Prophase I of meiosis is generally the longest phase of meiosis. Why might this be?

12. © 2011 Pearson Education, Inc. Meiotic Phases In this cell, what phase is represented? a)mitotic metaphase b)meiosis I anaphase c)meiosis I metaphase d)meiosis II anaphase e)meiosis II metaphase

13. © 2011 Pearson Education, Inc. Recombination and Natural Selection In which of the following ways are natural selection and recombination due to crossing over in meiosis I related? a) Recombinants undergo negative selection. b) Non-recombinants are positively selected in cases of environmental change. c) Most recombinants have lower fertility than non- recombinants. d) Some recombinants have positively selected new gene combinations. e) There is no relationship.