CHAP 13 - MEIOSIS

In animals, fertilization is to zygote as meiosis is to which of the following?

• mitosis

• diploid

• chromosome

• replication

• gamete

Privet shrubs and humans each have a diploid number of 46 chromosomes per cell. Why are the two species so dissimilar?

• Privet chromosomes undergo only mitosis.

• Privet chromosomes are shaped differently.

• Human chromosomes have genes grouped together differently

• The two species have appreciably different genes

• Privets do not have sex chromosomes.

Why is it more practical to prepare karyotypes by viewing somatic diploid cells rather than haploid gametes?

• Somatic diploid cells do not contain organelles to interfere with karyotyping

• Both sets of chromosomes, which are present in somatic diploid cells, need to be examined

• DNA in haploid gametes will not stain

• The chromosomes are larger in a somatic diploid cell

• Haploid gametes do not have sex chromosomes

In diploid species, diploid cells may undergo either mitosis or meiosis. Haploid cells may undergo mitosis (for certain species) but not meiosis because

• the sister chromatids cannot separate.

• the synaptonemal complex is too strong

• crossing over has occurred

• cohesins are no longer present.

• homologous chromosomes cannot pair

How and at what stage is independent assortment accomplished?

• pairing of homologs during meiosis I

• separation of homologs during anaphase II

• separation of homologs during meiosis II

• metaphase alignment during meiosis I

• telophase separation during meiosis I

Which one is like Mitosis from Chapter 12

• Meiosis I

• Meiosis II

In this cell, what phase is represented?

The graph below is based on data from the table; labels indicate the different phases of the meiotic cell cycle (MI = meiosis I; MII = meiosis II). Think carefully about the point on the graph where the line at the highest value begins to slope downward, indicated by the red arrow. What specific point of meiosis does this “corner”represent?