AP Biology - Concept 7.4 Review

Which process increases the genetic diversity of offspring?

• Mitosis

• Cloning

• Sexual reproduction

• Cytokinesis

• Fission

In a particular diploid organism, somatic cells have 24 chromosomes. How many chromosomes would be present in the gametes of that organism?

• 1

• 6

• 12

• 24

• 48

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

• homologous pairing.

• meiosis and fertilization.

• mitosis and cytokinesis.

• karyotyping.

• chiasmata.

Which statement about meiosis and mitosis is true?

• DNA replication occurs only in mitosis.

• DNA replication occurs only in meiosis

• The products of meiosis can be different from one another, while the products of mitosis are all the same (except for rare mutations).

• The products of mitosis can be different from one another, while the products of meiosis are all the same (except for rare mutations).

• Mitosis and meiosis are the same process.

In an organism with a diploid number of 8, a gamete has _______ chromosomes and a liver cell has _______ chromosomes.

• 8; 8

• 8; 4

• 2; 8

• 4; 8

• 4; 4

Which event is not part of sexual reproduction?

• The segregation of homologous chromosomes during gamete formation

• The fusion of sister chromatids during fertilization

• The fusion of haploid cells to form a diploid zygote

• The reduction in chromosome number during meiosis

• The production of genetically distinct gametes during meiosis

In an organism with a haploid number of 9, a skin cell has _______ chromosomes, a sperm cell at meiotic anaphase II has _______ chromosomes, and a newly formed zygote has _______ chromosomes.

• 18; 18; 18

• 9; 9; 9

• 9; 18; 9

• 18; 9; 9

• 18; 9; 18

Which statement about sister chromatids is false?

• They arise by replication during S phase.

• They separate from each other during each mitotic anaphase.

• They usually contain identical versions of the same genetic information.

• They separate from each other during meiosis I.

• They are joined during meiotic prophase I and meiotic metaphase I at their common centromere.

During meiosis, the sister chromatids separate during

• anaphase I.

• anaphase II.

• S phase.

• synapsis.

• telophase II.

At the end of the first meiotic division, each chromosome consists of

• chiasmata.

• a homologous chromosome pair.

• four copies of each DNA molecule.

• two chromatids.

• a pair of polar microtubules.