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Chapter 13: 13-3TYU (page 268)

Meiosis II is similar to mitosis in that

  1. sister chromatids separate during anaphase
  2. DNA replicates before the division.
  3. the daughter cells are diploid.
  4. homologous chromosomes synapse

Short Answer

Expert verified
  1. The option 鈥渟ister chromatids separate during anaphase鈥� is true.
  2. The option 鈥淒NA replicates before the division鈥� isfalse.
  3. The option 鈥渢he daughter cells are diploid.鈥� is false.
  4. The option 鈥渉omologous chromosomes synapse鈥� is false.

Step by step solution

01

Description of meiosis

There are two types of cell division, namely, mitosis and meiosis. Meiosis is the process that is specific for the sex cells. In meiosis, the division of cells takes place twice to form four haploid daughter cells.

02

Explanation of option “(A)”                                                           

Anaphase is a similar phase in mitosis and meiosis II. In this process, the cohesion protein is removed from the sister chromatids to allow the movement of the sister chromatids.

The segregation phase of chromosomes takes place in the anaphase of both mitosis and meiosis II.

Therefore, the given option is true.

03

Explanation of option “(B)”

Meiosis II is the process in which DNA replication occurs at the starting of meiosis II. The replication of DNA does not occur at the end of meiosis since there is no interphase required in the meiotic phase.

Mitosis is the process in which DNA replication takes place in the interphase or synthesis phase.

DNA replication is the difference between mitosis and meiosis II.

Therefore, the given option is false.

04

Explanation of option “(C)”

The daughter cells produced in the meiosis II process are haploid. The mitosis process can form both the haploid and diploid daughter cells.

The daughter cells produced in mitosis and meiosis differ in the number of chromosomes present.

Therefore, the given option is false.

05

Explanation of option “(D)”

Homologous chromosome synapse is the specific structure that is formed during the meiosis process. Synapse is formed by overlapping of chromosomes with each other. It is not formed in the mitosis process.

Homologous chromosome synapse is seen only in meiosis.

Therefore, the given option is false.

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Most popular questions from this chapter

Using what you know of gene expression in a cell, explain what causes the traits of parents (such as hair color) to show up in their offspring. (See Concept 5.5)

The diagram in question 6 represents just a few of the chromosomes of meiotic cells in a certain person. Assume the freckles gene is located at the locus marked F, and the hair color gene is located at the locus H, both on the long chromosome. The individual from whom this cell was taken has inherited different alleles for each gene ("freckles" and "black hair" from one parent, and "no freckles" in the gametes resulting from this meiotic event. (It will help if you draw out the rest of meiosis and label the alleles by name.) List other possible combinations of these alleles in this individual's gametes.

In Figure 13.4, how many DNA molecules (double helices) are present (see Figure 12.5)? What is the haploid number of this cell? Is a set of chromosomes haploid or diploid?

A certain eukaryote lives as a unicellular organism, but during environmental stress, it produces gametes. The gametes fuse, and the resulting zygote undergoes meiosis, generating new single cells. What type of organism could this be?

The continuity of life is based on heritable information in the form of DNA. IN a short essay (100-150 words), explain how chromosome behavior during sexual reproduction in animals ensures the perpetuation of parental traits in offspring and, at the same time, genetic variation among offspring.
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