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Transcript of 1234567 891011121314 15161718192021 22232425262728 29303132333435 36373839404142 43444546474849.

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How many daughter cells are produced during mitosis? Are they haploid or

diploid?

Two diploid cells

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During which phase of mitosis do chromosomes line up in the middle

of the cell?

Metaphase

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How many chromosomes do humans have in their body cells?

46 or 23 pairs

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When does a cell copy its DNA? Be specific.

S-phase of interphase

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What kind of cells are made from mitosis?

Somatic (body) cells

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What happens when the cell cycle is not regulated (out of control)?

Cancer

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What is the term used to describe a cell that has TWO sets of

chromosomes (one from mom and one from dad)?

Diploid (2n)

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What is the term used to describe cells that have just ONE set of

chromosomes?

Haploid (n)

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Name the phases of mitosis in order.

Prophase, metaphase, anaphase, telophase

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During which phase of mitosis does chromatin condense into

chromosomes?

prophase

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During which phase of mitosis do spindle fibers pull sister

chromatids apart?

anaphase

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What is the process when the parent cell is cleaved into two new

daughter cells?

cytokinesis

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During which phase of mitosis does the nuclear envelope begin to

reappear?

Telophase

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What is the phase where cell growth occurs?

G1 and G2 of interphase

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Meiosis

What is the process in which gametes are produced?

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What phase is represented by the picture?

Prophase

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What phase is represented in the picture?

Metaphase

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What phase is represented in the picture?

Anaphase

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What phase is represented by the picture?

Telophase

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How many cell divisions are involved in meiosis?

2

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What are the organelles that produce spindle fibers?

Centrioles

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When does the process of crossing-over occur?

Prophase 1

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Why does crossing-over occur?

To increase genetic diversity

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During what process of meiosis do homologous chromosomes line up in the center of the cell?

Metaphase 1

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At the end of meiosis 1 how many cells are produced?

2

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During which phase of meiosis are sister chromatids pulled apart?

Anaphase 2

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During which phase of meiosis do homologous chromosomes get

separated?

Anaphase 1

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If a cell begins meiosis with 34 chromosomes, how many will the

resulting four cells have?

17

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What is a karyotype?

A picture of an organism’s chromosomes in a mitotic cell

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What are all chromosomes besides sex chromosomes referred to as?

Autosomes

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What are a male’s sex chromosomes?

XY

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What are a female’s sex chromosomes?

XX

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What two things can be determine by analyzing a karyotype?

Gender and genetic disorders

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What is the structure that holds sister chromatids together?

Centromere

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What genetic disorder is shown in this karyotype?

Down Syndrome

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What is Turner Syndrome?

When a female is missing one of her X chromosomes

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What is Klinefelter Syndrome?

When a male has an extra X chromosome

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If an organisms diploid cells have 30 chromosomes, how many

chromosomes would be in it’s sex cell?

15

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What is the longest phase of the cell cycle?

Interphase

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What is the longest phase of mitosis?

Prophase

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What is spermatogenesis?

The production of sperm cells

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What is oogenesis?

The production of egg cells

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What is the purpose of mitosis?

To produce more body cells

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What is the purpose of meiosis?

To produce sex cells

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Describe cytokinesis in plant cells.

Cell plate forms midway between the divided nuclei

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What phase of meiosis does the picture represent?

Anaphase 1

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What phase of meiosis does the picture represent?

Metaphase 1

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How many cells are produced from meiosis? Are they haploid or

diploid?

Four haploid cells

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What phase of meiosis is represented in the picture?

Telophase 2