Biology 11A Chapter 10 and 11 - Post Lab Review

If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II?

12

If a sperm cell contains 8 chromosomes, it comes from an animal that has (_____) chromosomes.

16

During which phase of mitosis do the sister chromatids separate and head towards opposite poles of the cell?

Anaphase

During which phase of meiosis do the homologous chromosomes separate and head towards opposite poles of the cell?

Anaphase I

Place the correct phrase of meiosis in the proper sentence. Then list the phases of meiosis in the correct order.

During (telophase I), sister chromatids reach their respective poles and decondense; nuclear membrane re-forms and nucleoli reappear. Homologues reach their respective poles during (telophase I), the nuclear membrane re-forms to produce two separate nuclei During (anaphase I), the homologous chromosomes (paired bivalents) separate from each other During (metaphase I) the bivalents (pairs of homologous chromosomes) are organized along the metaphase plate. At the beginning of (Prophase II), homologues have already separated; nuclear membrane dissociates; chromatids condense; spindle apparatus forms and nucleolus disappears Synapsis and crossing occur occur during (prophase I). as (anaphase II) proceeds sister chromatids are separated and are pulled toward the pole to which they are attached. During (metaphase II), all sister chromatids align themselves along the metaphase plate.

Classify the following descriptions of stages of the cell cycle into interphase and mitosis

Interphase: G1, S, G2 Mitosis: Prophase, late prophase, metaphase, anaphase, telophase, cytokinesis

Classify the following stages of the cell cycle into meiosis or mitosis.

PMAT

Place the following images into the correct order to represent meiosis I.

PMAT

Place the images in the correct order of stages of mitosis

PMAT

Place the stages of meiosis into the correct order.

PMAT

Place the following images in the correct order to represent meiosis II

PMAT II

During this stage of mitosis, the nuclear envelope begins to break down and the spindle begins to form.

Prophase

During which phase do the chromosomes start to condense?

Prophase

Which of the following represents the correct order of the phases of mitosis?

Prophase->metaphase->anaphase->telophase

During this phase of the cell cycle, the chromosomes are replicated.

S phase

What occurs in anaphase?

Sister chromatids move to opposite poles

During which phase do the nuclear membrane reforms around the chromosomes?

Telophase

During which phase of mitosis do the chromosomes line up in the center of the cell?

metaphase

During which phase of meiosis do the homologous chromosomes line up across from each other in the center of the cell?

metaphase I

During which phase of meiosis do the sister chromatids line up across from each other in the center of the cell?

metaphase II