Meiosis

Question 1

What does meiosis produce?

Answer 1

gametes, 4 genetically different cells wih half the DNA (diploid)

Question 2

How does meiosis produce variation?

Answer 2

crossing over

independent assortment

Question 3

What happens in prophase 1?

Answer 3

the chromosomes condense and become visible then arrange themselves into homologous pairs
crossing over occurs
nuclear envelope breaks down
spindle forms

Question 4

What happens in metaphase 1?

Answer 4

Homologous pairs line up on the equator of the cell and attach to the spindle fibers by the centromeres

Question 5

What happens in anaphase 1?

Answer 5

The spindles contract

the homologous pairs get separated and move to opposite poles of the cell

Question 6

What happens in telophase 1? and cytokinesis

Answer 6

Nuclear envelope forms around each of the chromosomes

two haploid daughter cells are produces when the cytoplasm divides

Question 7

What happens in prophase 2?

Answer 7

chromosomes condense and become visible

Question 8

What happens in metaphase 2?

Answer 8

the chromosomes are aligned at the equator of the cell and are joined to the spindle by the centromere

Question 9

What happens in anaphase 2?

Answer 9

The spindle fibers contract

the pair of sister chromatids separate at two opposite poles of the cell

Question 10

What is crossing over?

Answer 10

homologous pairs line up and twist over each other exchanging parts of their chromatids

Question 11

What is independent segregation?

Answer 11

the separation and mixing of chromosomes

/ random alignment