1 During mitotic anaphase chromosomes migrate A from the pol

1. During mitotic anaphase, chromosomes migrate

A) from the poles of the cell toward the equatorial plate.

B) from the equatorial plate toward the poles.

C) toward the nuclear envelope.

D) along with their sister chromatids toward one pole.

E) along with the other member of the homologous pair toward the equatorial plate.

2. Which statement about homologous chromosome pairs is false?

A) They come from only one of the individual\'s parents.

B) They usually contain slightly different versions of the same genetic information.

C) They separate from each other during meiosis I.

D) They synapse during meiosis I.

E) Each contains two sister chromatids at the beginning of meiosis I.

3. An environmental change that leads to the production of decreased levels of cyclin expression would tend to _______ the activity of the CDK. This would lead to _______ phosphorylation of RB, which in turn would lead to _______ cells being stopped at the R point.

A) increase; increased; more

B) increase; decreased; fewer

C) increase: decreased; fewer

D) decrease; increased; fewer

E) decrease; decreased; more

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4. The exchange of genetic material between chromatids on homologous chromosomes occurs during

A) interphase.

B) mitosis and meiosis.

C) prophase I.

D) anaphase I.

E) anaphase II.

5. Down syndrome can be diagnosed by means of an examination of the individual\'s A) spores.

B) karyotype. C) chromatin. D) nucleosomes. E) kinetochores.

A product of asexual reproduction differs from its parent by a base pair change. This change occurred due to
A) meiosis.
B) translocation.

C) mutation.
D) fertilization. E) recombination.

Solution

1B   During mitotic anaphase, chromosomes migrate from the equatorial plate toward the poles.

2A The statement about homologous chromosome pairs that they come from only one of the individual\'s parents is false.

3E An environmental change that leads to the production of decreased levels of cyclin expression would tend to decreased the activity of the CDK. This would lead to decreased phosphorylation of RB, which in turn would lead to fewer cells being stopped at the R point.

4 C . The exchange of genetic material between chromatids on homologous chromosomes occurs during prophase I.

5 B . Down syndrome can be diagnosed by means of an examination of the individual\'s karyotype.

A product of asexual reproduction differs from its parent by a base pair change. This change occurred due to C) mutation