Meiosis

Question 1

Interphase

Answer 1

1. the first stage of the cell cycle
2. cell grows and replicates its DNA in preparation for division

Question 2

Prophase I

Answer 2

1. dna condenses and becomes visible as chromosomes
2. two sister chromatids
3. arranged in homologous pairs
4. spindle is formed

Question 3

Metaphase I

Answer 3

1. bivalents line up along the equator of the spindle
2. independent assortment occurs

Question 4

Anaphase I

Answer 4

1. homologous pairs of chromosomes separated
2. microtubules pull whole chromosomes to opposite ends of spindle

Question 5

Telophase I

Answer 5

1. nuclear envelopes form around the two groups of chromosomes
2. spindle fibres start to break down

Question 6

Cytokinesis

Answer 6

1. division of cytoplasm occurs
2. cell surface membrane pinches inwards creating a cleavage furrow
3. two haploid cells produced

Question 7

Prophase II

Answer 7

1. nuclear envelope breaks down and chromosomes condense
2. spindle forms at right angle to the old one

Question 8

Metaphase II

Answer 8

1. chromosomes line up in a single file along equator of spindle

Question 9

Anaphase II

Answer 9

1. chromatids are pulled to opposite poles
2. four groups of chromosomes are created

Question 10

Telophase II

Answer 10

1. nuclear membranes form around each group of chromosomes

Question 11

Cytokinesis

Answer 11

1. cytoplasm divides
2. creates four haploid cells