Mitosis and Meiosis Review True or False Mitosis

Mitosis and Meiosis Review

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

True

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 the two nuclei.

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

• True

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

• True

• How do bacteria reproduce?

• Binary fission (asexual reproduction)

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

• Centromere

• 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 __________.

• nondisjunction

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 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 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 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) 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) 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) 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) 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) 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) 2 (b) 4 (c) 8 (d) 16 (e) 32 (f) None of these

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

• Karyotype

The spreading of cancer is called ________

• Metastasis

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

• c) a zygote is diploid

Name the procedure used to produce a karyotype.

• Amniocentesis

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

• A. microtubule

When does nondisjunction occur? (during what phases)

Anaphase I or Anaphase II

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

True

• 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, so 48 chromatids

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

• False; between HOMOLOGOUS chromosomes

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

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

DNA, or an identical sister chromatid

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

• A) prophase

What phase is being shown?

Anaphase

Cytokinesis is the division of ___

Cytoplasm

In which phase does the DNA condense into visible chromosomes?

prophase

What phase is being shown?

Metaphase I of Meiosis

These noncoding ends of chromosomes are called _______ Shown in yellow

Telomeres

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

• Skin cells

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

• somatic, diploid

• The process by which a zygote is formed is called_______

Fertilization

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

Oogenesis

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 •