Mitosis and Meiosis Review True or False Mitosis

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Mitosis and Meiosis Review

Mitosis and Meiosis Review

True or False? • Mitosis is considered to be a form of asexual reproduction

True or False? • Mitosis is considered to be a form of asexual reproduction

True

True

True or False? • During cytokinesis in plant cells, the cell is pinched in

True or False? • During cytokinesis in plant cells, the cell is pinched in half by a belt of protein threads.

 • False; in plant cells a cell plate and cell wall forms between

• False; in plant cells a cell plate and cell wall forms between the two nuclei.

True or False? • Meiosis produces four cells that have different chromosome numbers from

True or False? • Meiosis produces four cells that have different chromosome numbers from the parent cell.

 • True

• True

True or false? • Cells spend most of their lifetime in interphase.

True or false? • Cells spend most of their lifetime in interphase.

 • True

• True

 • How do bacteria reproduce?

• How do bacteria reproduce?

 • Binary fission (asexual reproduction)

• Binary fission (asexual reproduction)

 • The point at which two chromatids are attached to each other in

• The point at which two chromatids are attached to each other in a chromosome is called a ______

 • Centromere

• Centromere

 • How many chromosomes are in the body cells of an organism that

• How many chromosomes are in the body cells of an organism that has a haploid number of 8?

 • The failure of replicated chromosomes to separate is called __________.

• The failure of replicated chromosomes to separate is called __________.

 • nondisjunction

• nondisjunction

A cell has a diploid number of 8. How many chromatids will it have

A cell has a diploid number of 8. How many chromatids will it have in G 2? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many chromatids will it have

A cell has a diploid number of 8. How many chromatids will it have in G 2? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many chromatids would a newly

A cell has a diploid number of 8. How many chromatids would a newly formed sperm cell have? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many chromatids a newly formed

A cell has a diploid number of 8. How many chromatids a newly formed sperm cell have? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many homologous pairs of chromosomes?

A cell has a diploid number of 8. How many homologous pairs of chromosomes? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many homologous pairs of chromosomes?

A cell has a diploid number of 8. How many homologous pairs of chromosomes? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many telomeres in G 2?

A cell has a diploid number of 8. How many telomeres in G 2? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many telomeres in G 2?

A cell has a diploid number of 8. How many telomeres in G 2? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many chromosomes from the mother?

A cell has a diploid number of 8. How many chromosomes from the mother? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

A cell has a diploid number of 8. How many chromosomes from the mother?

A cell has a diploid number of 8. How many chromosomes from the mother? (a) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

 • A picture of a cell’s chromosomes is called a ____________

• A picture of a cell’s chromosomes is called a ____________

 • Karyotype

• Karyotype

The spreading of cancer is called ________

The spreading of cancer is called ________

 • Metastasis

• Metastasis

Which of these is diploid? • • a) b) c) d) egg cell sperm

Which of these is diploid? • • a) b) c) d) egg cell sperm cell zygote none of the above

 • c) a zygote is diploid

• c) a zygote is diploid

Name the procedure used to produce a karyotype.

Name the procedure used to produce a karyotype.

 • Amniocentesis

• Amniocentesis

A spindle fiber is a specialized form of a. microtubule. c. cilium. b. flagellum.

A spindle fiber is a specialized form of a. microtubule. c. cilium. b. flagellum. d. chromosome.

 • A. microtubule

• A. microtubule

When does nondisjunction occur? (during what phases)

When does nondisjunction occur? (during what phases)

Anaphase I or Anaphase II

Anaphase I or Anaphase II

True or False? During telophase, a nuclear envelope surrounds each new set of chromosomes

True or False? During telophase, a nuclear envelope surrounds each new set of chromosomes

True

True

 • A cell is in G 2, preparing to enter mitosis. • It

• A cell is in G 2, preparing to enter mitosis. • It has 12 pairs of chromosomes. • How many total chromatids are present?

48 • 12 pairs = 24 total chromosomes • each chromosome has 2 chromatids,

48 • 12 pairs = 24 total chromosomes • each chromosome has 2 chromatids, so 48 chromatids

True or False? Crossing-over is the exchange of reciprocal segments of DNA between non-homologous

True or False? Crossing-over is the exchange of reciprocal segments of DNA between non-homologous chromosomes.

 • False; between HOMOLOGOUS chromosomes

• False; between HOMOLOGOUS chromosomes

Diagrams A and B show cells from an organism with a diploid chromosome number

Diagrams A and B show cells from an organism with a diploid chromosome number of 4. Which will be diploid at the completion of division? a) A b) B c) both A and B d) neither A nor B

 • A; it is going through mitosis

• A; it is going through mitosis

What is synthesized during the S phase of the cell cycle?

What is synthesized during the S phase of the cell cycle?

DNA, or an identical sister chromatid

DNA, or an identical sister chromatid

When do centrioles move to the poles of a cell? • • A) B)

When do centrioles move to the poles of a cell? • • A) B) C) D) prophase metaphase anaphase telophase

 • A) prophase

• A) prophase

What phase is being shown?

What phase is being shown?

Anaphase

Anaphase

Cytokinesis is the division of ___

Cytokinesis is the division of ___

Cytoplasm

Cytoplasm

In which phase does the DNA condense into visible chromosomes?

In which phase does the DNA condense into visible chromosomes?

prophase

prophase

What phase is being shown?

What phase is being shown?

Metaphase I of Meiosis

Metaphase I of Meiosis

These noncoding ends of chromosomes are called _______ Shown in yellow

These noncoding ends of chromosomes are called _______ Shown in yellow

Telomeres

Telomeres

Which cells divide the most quickly? • • a) b) c) d) red blood

Which cells divide the most quickly? • • a) b) c) d) red blood cell liver cell neurons skin cell

 • Skin cells

• Skin cells

Another name for body cells is _____ cells. They are always haploid/diploid. (choose one)

Another name for body cells is _____ cells. They are always haploid/diploid. (choose one)

 • somatic, diploid

• somatic, diploid

 • The process by which a zygote is formed is called_______

• The process by which a zygote is formed is called_______

Fertilization

Fertilization

What is the name for the process that produces egg cells? • (more specific

What is the name for the process that produces egg cells? • (more specific than meiosis)

Oogenesis

Oogenesis

Final question: • • • Name the disorders that we discussed that were examples

Final question: • • • Name the disorders that we discussed that were examples of: A) monosomy B) trisomy

A) Turner syndrome is monosomy X • B) Down syndrome is trisomy 21 •

A) Turner syndrome is monosomy X • B) Down syndrome is trisomy 21 •