Meiosis - AP Bio

Which of the following occurs during anaphase II?

• Sister chromatids separate and migrate toward opposite poles.

• Homologs separate and migrate toward opposite poles.

• Nuclei form.

• Chromosomes line up in one plane.

• The synaptonemal complex disappears.

Tags

NGSS.HS-LS1-4

In sexually reproducing species, the chromosome number remains stable over time because __________ and __________ always alternate.

• meiosis; fertilization

• meiosis; mitosis

• mitosis; fertilization

• meiosis; interphase

• meiosis I; meiosis II

Which chromosomal event occurs only during prophase I of the first meiotic division?

• Homologous chromosomes line up at the center of the cell.

• The nuclear envelope breaks down.

• Replication of DNA takes place.

• A spindle of microtubules forms.

• Synapsis of homologous chromosomes occurs.

Homologous chromosomes move toward opposite poles of a dividing cell during __________.

• binary fission

• fertilization

• meiosis II

• mitosis

• meiosis I

Which of the following contributes to genetic variation in sexually reproducing species?

• Independent assortment, crossing over, and random fertilization

• Crossing over, internal fertilization, and independent assortment

• Independent assortment, spindle formation, and random fertilization

• Random fertilization, DNA synthesis, and independent assortment

• Internal fertilization, spindle formation, and crossing over

Tags

NGSS.HS-LS4-2

In a male mammal, every germ cell that undergoes meiosis in the production of gametes gives rise to __________ sperm.

• four

• one

• two

• no set number of

• zero

Tags

NGSS.HS-LS3-2

Crossing over occurs during __________.

• prophase I

• cytokinesis

• metaphase I

• prophase II

• metaphase II

In a diploid cell containing 10 chromosomes, meiosis results in the formation of daughter cells containing __________ chromosomes.

• 5

• 10

• 20

• 40

• 0

Fertilization produces a __________.

• diploid zygote

• haploid zygote in some life cycles and a diploid zygote in others

• haploid zygote

• diploid zygote, except during the gametophyte stage of alternation of generations

• multicellular haploid organism in a life cycle with an alternation of generations

Human somatic cells contain __________ set(s) of chromosomes and are therefore termed __________.

• two; diploid

• one; diploid

• two; haploid

• one; haploid

• three; triploid