12. Meiosis

Meiosis II

Norway rats have 42 chromosomes in their diploid cells. If such a cell enters meiosis, how many chromosomes and double-helical molecules of DNA will be present in each daughter cell at the end of meiosis II?
a. 21 chromosomes and 21 double-helical DNA molecules
b. 21 chromosomes and 42 double-helical DNA molecules
c. 42 chromosomes and 42 double-helical DNA molecules
d. 42 chromosomes and 84 double-helical DNA molecules

Meiosis II is similar to mitosis in that
a. sister chromatids separate during anaphase.
b. DNA replicates before the division.
c. the daughter cells are diploid.
d. homologous chromosomes synapse.

Evaluate this statement: Animals evolved from simple to complex.

 Homologs separate and migrate toward opposite poles. 

 No. This may occur during telophase I and does occur during telophase II. 

 No. This happens on the metaphase plate during metaphase I and II. 

 No. The synaptonemal complex appears and disappears during prophase I. 

 Sister chromatids separate and migrate toward opposite poles. 

Review the events of meiosis II. The same structures are separated during anaphase of mitosis.

Which of the following occurs during anaphase II?

During which of the following stages of meiosis do homologous chromosomes pair up and align along the metaphase plate of the cell?a) Metaphase I of meiosis.b) Telophase I of meiosis.c) Anaphase I of mitosis.d) Metaphase II of meiosis.

If we continue to follow the cell lineage from question 4, then the DNA content of a single cell at metaphase of meiosis II will be
a. 0.25x.
b. 0.5x.
c. x.
d. 2x.

List several ways in which meiosis differs from mitosis.

Why is it ecologically significant that animals are heterotrophic and multicellular?

Homologous chromosomes align on the metaphase plate in meiosis II.

Sister chromatids separate in mitosis, and homologous chromosomes separate in meiosis II.

Meiosis II occurs in a haploid cell, while mitosis occurs in diploid cells.

Meiosis II is known as “reductional division” while mitosis is known as “equatorial division”.

Which statement describes a major difference between meiosis II and mitosis in a diploid animal?a) Homologous chromosomes align on the metaphase plate in meiosis II.b) Sister chromatids separate in mitosis, and homologous chromosomes separate in meiosis II.c) Meiosis II occurs in a haploid cell, while mitosis occurs in diploid cells.d) Meiosis II is known as “reductional division” while mitosis is known as “equatorial division”.

Phases of meiosis II | Cells | MCAT | Khan Academy

What separates during Anaphase II?a) The cytoplasm.b) Sister Chromatids.c) Homologous chromosomes.d) Daughter nuclei.

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