BIO Campbell Ch. 8
BioFlix Activity: Mitosis -- Stages of the Cell Cycle
1) Most of the cell's life is spent in interphase, when growth occurs. Cells that are about to divide replicate their DNA. 2) In prophase microtubules form the mitotic spindle, and the nuclear envelope breaks up. 3) At metaphase, the mitotic spindle is fully formed and chromosomes are lined up in the center of the cell. 4)In anaphase, sister chromatids separate and become full-fledged chromosomes that move to opposite poles. 5) In telophase chromosomes become less condensed and new nuclear envelopes form. In cytokinesis the cytoplasm divides.
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. (Segments of nonsister chromatids trade places during prophase I, resulting in recombination.)
The sister chromatids separate and begin moving toward opposite poles of the cell during which phase of mitosis?
Anaphase (Sister chromatids separate and start their migration toward opposite poles during anaphase.)
During _____ both the contents of the nucleus and the cytoplasm are divided.
the mitotic phase (The mitotic phase encompasses both mitosis and cytokinesis.)
Video Tutor Session Quiz: Mitosis vs. Meiosis E
the start of meiosis I (We can see that the chromosomes are duplicated and lined up by homologous pair. That only happens at the start of meiosis I.)
BioFlix Activity: Meiosis -- Meiosis I
Chromosomes scrambled (prophase I), chromosomes gather in center (metaphase I), chromosomes separate into either side of the spindle (anaphase I), both groups of chromosomes now in their own respective "ball" (telophase I and Cytokinesis)
During prophase I of meiosis,
homologous chromosomes stick together in pairs. (Homologous chromosomes stick together in pairs during prophase I.)
Which processes lead to most genetic variation in sexually reproducing organisms?
independent orientation of chromosomes in meiosis, crossing over, random fertilization
A cell preparing to undergo meiosis duplicates its chromosomes during
interphase (Chromosomes are duplicated during interphase.)
During _____ the cell grows and replicates both its organelles and its chromosomes.
interphase (These are the events of interphase.)
Video Tutor Session Quiz: Mitosis vs. Meiosis B
meiosis I only (Meiosis I is the only time that chromosomes line up by homologous pairs.)
Video Tutor Session Quiz: Mitosis vs. Meiosis A
mitosis (Mitosis goes on continuously in most parts of the body, whereas meiosis takes place only in the gonads.)
The correct order of events during meiosis is
prophase I, metaphase I, anaphase I, telophase I, cytokinesis, meiosis II. (Meiosis starts with prophase I and continues with metaphase I, anaphase I, telophase I, and cytokinesis. This is followed by meiosis II.)
Video Tutor Session Quiz: Mitosis vs. Meiosis D
10 (If the hypothetical organism has 5 chromosomes in one of its gametes, then it must have 10 chromosomes in a body cell. Just before mitosis, the chromosomes in a body cell are duplicated, but the sister chromatids remain joined together. So you will see 10 (duplicated) chromosomes in a typical body cell.)
Which of these gametes contains one or more recombinant chromosomes?
B and C (Each of the chromosomes in gametes B and C are composed of material derived from both parents.)
Which of these phases encompasses all of the stages of mitosis?
E
BioFlix Activity: Meiosis -- Meiosis II
Follow Meiosis I card set
The chromosomes line up in the center of the cell during which phase of mitosis?
Metaphase (Metaphase occurs in the middle of mitosis, when the chromosomes line up in the middle of the cell.)
The centrosomes move away from each other and the nuclear envelope breaks up during which phase of mitosis?
Prophase (Prophase is the first phase of mitosis, when the centrosomes begin moving toward opposite poles and the nuclear envelope breaks up.)
The chromosomes arrive at the poles and nuclear envelopes form during which phase of mitosis?
Telophase (Telophase is the final phase of mitosis, when the chromosomes have arrived at the poles and the nuclear envelopes of the two new cells form.)
What must happen before a cell can begin mitosis?
The chromosomes must be duplicated. (Before mitosis can begin, the chromosomes, or genetic material, must be copied, which occurs during interphase.)
BioFlix Activity: Mitosis -- The Cell Cycle
a) G1 phase, b) S phase, c) interphase, d) G2 phase, e) Mitotic (M) phase, f) Mitosis, g) Cytokinesis
BioFlix Activity: Mitosis -- Events of Mitosis
a) Mitotic spindle forming b) Sister chromatids centered c) Chromosomes separating d) Nuclear envelopes forming e) Interphase f) Prophase g) Metaphase h) Anaphase i)Telophase and cytokenesis
BioFlix Activity: Meiosis -- Overview
a) diploid organisms, b) haploid gametes, c) meiosis, d) maternal chromosomes, e) crossing over occurs, f) sister chromatids separate
Learning through Art: Human Life Cycle
a) gametes, b) haploid, c) meiosis, d) fertilization, e) diploid, f) zygote, g) mitosis
BioFlix Activity: Meiosis -- Comparing Mitosis and Meiosis
a) mitosis b) prophase c) metaphase d) anaphase. telophase and cytokinesis e) meiosis f) prophase I g) metaphase I h) anaphase I, telophase I and cytokinesis I) Meiosis II
Connecting the Concepts: Cell Division
a) mitosis, b) meiosis, c) asexual reproduction, d) somatic cells, e) gametes, f) sexual reproduction
BioFlix Activity: Meiosis -- Chromosome Structure
a) pair of homologous chromosomes, b) centromere, c) sister chromatids
Video Tutor Session Quiz: Mitosis vs. Meiosis C
centromere (The centromere is the point of attachment between two duplicated chromosomes.)
At the end of the mitotic (M) phase, the cytoplasm divides in a process called _________________.
cytokinesis (Cytokinesis is the division of the cytoplasm that occurs in conjunction with telophase, the last phase in mitosis.)
Meiosis starts with a single diploid cell and produces
four haploid cells. (Meiosis produces four haploid cells.)