Biology 2015

If a parent cell has 16 chromosomes, then each of the daughter cells following meiosis will have
a. 48 chromosomes.
b. 32 chromosomes.
c. 16 chromosomes.
d. 8 chromosomes.

A bivalent is
a. a homologous chromosome.
b. the paired homologous chromosomes.
c. a duplicated chromosome composed of sister chromatids.
d. the two daughter cells after meiosis I.
e. the two centrioles in a centrosome.

The synaptonemal complex
a. forms during prophase I of meiosis.
b. allows synapsis to occur.
c. forms between homologous chromosomes.
d. All of these are correct.

Crossing-over occurs between
a. sister chromatids of the same chromosome.
b. two different kinds of bivalents.
c. two different kinds of chromosomes.
d. nonsister chromatids of a bivalent.
e. two daughter nuclei.

Which of the following occurs at metaphase I of meiosis?
a. independent assortment
b. crossing-over
c. interkinesis
d. formation of new alles

At the metaphase plate during metaphase I of meiosis, there are
a. chromosomes consisting of one chromatid.
b. unpaired duplicated chromosomes.
c. bivalents.
d. homologous pairs of chromosomes.
e. Both c and d are correct.

At the metaphase plate during metaphase lI of meiosis, there are
a. chromosomes consisting of one chromatid.
b. unpaired duplicated chromosomes.
c. bivalents.
d. homologous pairs of chromosomes.
e. Both c and d are correct.

During which phase of meiosis do homologous chromosomes separate?
a. prophase I
b. telophase I
c. anaphase I
d. anaphase lI

Mitosis _____ chromosome number, whereas meiosis _____ the chromosome number of the daughter cells.
a. maintains; increases
b. increases; maintains
c. increases; decreases
d. maintains; decreases

For questions $10-13$ , match the statements that follow to the items in the key. Answers may be used more than once, and more than one answer may be used.
Key:
a. mitosis
b. meiosis
c. meiosis II
d. Both meiosis I and meiosis Il are correct.
e. All of these are correct.
Involves pairing of duplicated homologous chromosomes

For questions $10-13$ , match the statements that follow to the items in the key. Answers may be used more than once, and more than one answer may be used.
Key:
a. mitosis
b. meiosis
c. meiosis II
d. Both meiosis I and meiosis Il are correct.
e. All of these are correct.
A parent cell with five duplicated chromosomes will produce daughter cells with five chromosomes consisting of one chromatid each.

For questions $10-13$ , match the statements that follow to the items in the key. Answers may be used more than once, and more than one answer may be used.
Key:
a. mitosis
b. meiosis
c. meiosis II
d. Both meiosis I and meiosis Il are correct.
e. All of these are correct.
Nondisjunction may occur, causing abnormal gametes to form.

For questions $10-13$ , match the statements that follow to the items in the key. Answers may be used more than once, and more than one answer may be used.
Key:
a. mitosis
b. meiosis
c. meiosis II
d. Both meiosis I and meiosis Il are correct.
e. All of these are correct.
Involved in growth and repair of tissues

Polar bodies are formed during the process of
a. spermatogenesis.
b. gametophyte formation.
c. sporophyte formation.
d. oogenesis.
e. None of these are correct.

In humans, gametogenesis results in the formation of
a. diploid egg and sperm cells.
b. gametophytes.
c. sporophytes.
d. haploid egg and sperm cells.
e. a zygote.

Nondisjunction during meiosis 1 of oogenesis will result in eggs that have
a. the normal number of chromosomes.
b. one too many chromosomes.
c. one less than the normal number of chromosomes.
d. Both b and c are correct.

In which of the following is genetic material moved between
nonhomologous chromosomes?
$$\begin{array}{ll}{\text { a. insertion }} & {\text { d. translocation }} \\ {\text { b. nondisjunction }} & {\text { e. inversion }} \\ {\text { c. deletion }}\end{array}$$

Which of the following is not an aneuploid condition?
$$\begin{array}{ll}{\text { a. Turner syndrome }} & {\text { c. Alagille syndrome }} \\ {\text { b. Down syndrome }} & {\text { d. Klinefelter syndrome }}\end{array}$$