Meiosis

Question 1

Prophase 1

Answer 1

Supercoils. Chromosomes condense. Nuclear membrane dissolves. Homologous pairs form bivalents. Crossing over.

Question 2

Metaphase 1

Answer 2

Spindle fibers attach to homologous chromosomes. They line up along equator.

Question 3

Anaphase 1

Answer 3

Fibers contract and split pairs. Chromosomes move to the two poles.

Question 4

Telophase 1

Answer 4

Chromosomes decondense. Nuclear membrane reforms. Cytokinesis.

Question 5

Meiosis 2

Answer 5

Basically the same as the first, except it’s the chromosomes doing stuff not the homologous pairs.

Question 6

Cancer

Answer 6

When cells lose control over cell division. Can occur in any tissue or organ.

Question 7

Primary

Answer 7

Abnormal mass of cells at original site of development t.

Question 8

Secondary

Answer 8

Metastasized. Tumors in secondary locations.

Question 9

Benign

Answer 9

Do not spread, non cancerous, don’t impede functions.

Question 10

Malignant

Answer 10

Does not resemble parent tissue. Spreads. Impairs function.

Question 11

Mutagen

Answer 11

Outside agent that causes a mutation. Carcinogen- causes cancer.

Question 12

Proto-oncogenes

Answer 12

Normal gene that codes for a protein that stimulates cell division.

Question 13

Oncogene

Answer 13

Mutated proto-oncogene. May cause cancer. Over 40 know.

Question 14

Anti-oncogenes

Answer 14

Tumor suppression gene. May fix damaged DNA. May destroy cells where DNA cannot be fixed. BRCA 1 and 2

Question 15

Diploid haploid

Answer 15

2 of each chromosome pair vs. one.