Biology Exam 3 - Chapter 8

The sister chromatids separate and begin moving toward opposite poles of the cel during which phase of mitosis?

Anaphase

Telophase

Chromosomes become less condensed and new nuclear envelopes form. In cytokinesis the cytoplasm divides

At the end of the mitotic (M) phase, the cytoplasm divides in a process called

Cytokinesis

Which of these phases encompasses all of the stages of mitosis?

E Mitosis

Anaphse

Sister chromatids separate and become full-fledged chromosomes that move to opposite poles

The chromosomes arrive at the poles and nuclear envelopes form during which phase of mitosis?

Telophase

What must happen before a cell can begin mitosis?

The chromosomes (DNA) must be duplicated

During _______ both the contents of the nucleus and the cytoplasm are divided

The mitotic phase

Metaphase

The mitotic spindle is fully formed and chromosomes are lined up in the center of the cell

Can you organize these terms that describe the different kinds of cell division?

Two types of cell division: 1. Mitosis 2. Meiosis

Meiosis starts with a single diploid cell and produces

four haploid cells

A cell preparing to undergo meiosis duplicates its chromosomes during

interphase

During ________ the cell grows and replicates both its organelles and its chromosomes

interphase

if you look through a microsome with chromosomes lined up 2 by 2, which cellular stage of reproduction must you be looking at?

meiosis I only

The chromosomes line up in the center of the cell during which phase of mitosis?

metaphase

The centrosomes move away from each other and the nuclear envelope breaks up during which phase of mitosis?

prophase

During meiosis, segments of nonsister chromatids can trade places. This recombination of maternal and paternal genetic material is a key feature of meiosis. during what phase of meiosis does recombination occur?

prophase I

the correct order of events during meiosis is

prophase I, metaphase I, anaphase I, telophase I, cytokinesis, and meiosis II

Can you label the stages of the cell cycle?

*See Screenshot* 1. interphase 2. prophase 3. Metaphase 4. anaphase 5. telophase

Which processes lead to most genetic variation in sexually reproducing organisms?

- Independent orientation of chromosomes in meiosis - random fertilization - crossing over

Can you label the phases of the cell cycle?

1. G1 phase 2. S phase 3. Interphase 4. G2 phase 5. Mitotic (M) phase 6. Mitosis 7. cytokinesis

If the hypothetical organism has 5 chromosomes in one of its gametes, then it must have _______ chromosomes in a body cell.

10

Which of these gametes contains one or more recombinant chromosomes?

B and C

During prophase I of meiosis

Homologous chromosomes stick together in pairs

Prophase

Microtubules form the miotoic spindle and the nuclear envelope breaks up

of the two processes we learned about, which is going on in my hand right now?

Mitosis

Interphase

Most of the cells life is spent in interphase, when growth occurs. Cells that are about to divide replicate their DNA