Meiosis Review

Question 1

Meiosis involves ____ cell divisions with one ____.

Answer 1

Two;

Round of DNA replication.

Question 2

During meiosis, the number of chromosomes per cell is reduced to ____: the information that is lost will be replaced when two such cells, one from each patent, merge.

Answer 2

1/2 of the original number.

Question 3

During S phase in the cell cycle, DNA is exactly duplicated so that the cell can divide without loss of any information. The two duplicate chromosomes that result are called ____.

Answer 3

Sister chromatids.

Question 4

Two chromosomes in w single cell that contain the same type of instructions, but not necessarily the same instructions, are said to be ____. That is, they are ____ of a single chromosome.

Answer 4

Homologous;

Different versions.

Question 5

____ cells contain both homologous chromosomes. (This doesn’t refer to the number of chromosomes, it refers to the number of ____.)

Answer 5

Diploid;

Different version of each chromosome.

Question 6

Haploid cells contain only one ____ of each chromosome (although they may contain two ____).

Answer 6

Version;

Copies.

Question 7

In the first round of division in meiosis, when the chromosomes separate during anaphase, the ____ separate and the ____ stay together.

Answer 7

Homologous chromosomes;

Sister chromosomes.

Question 8

In the second round of division in meiosis, the ____ separate.

Answer 8

Sister chromatids.