Meiosis

Question 1

Meiosis 1

Answer 1

chromosomal reduction

Question 2

Chromosomal Reduction

Answer 2

Go from Diploid to haploid chromsomes (23 chromosomes)

Question 3

Meosis 2

Answer 3

tear apart sister chromatids

Question 4

Synapsis in Meosis 1

Answer 4

• homologous chromosomes loosly pair up, aligned gene by gene

Question 5

Crossing Over

Answer 5

Non sister chromatids exchange DNA segments ; way of genetic diversity

Question 6

When does crossing over occur?

Answer 6

in Prophase 1

Question 7

Chiasmata

Answer 7

area in a tetrad that is X-shaped regions where crossing over occurred

Question 8

Anaphase 1

Answer 8

• chromsomes separate
• one chromsome move toward each pole
• sister chromatids remain attached and move as one unit

Question 9

Telophase 1

Answer 9

each half of the cell has a haploid set of chromosomes; each chromosome still consists of two sister chromatids

Question 10

Cytokinesis 1

Answer 10

forming two haploid daughter cells

Question 11

Metaphase 2

Answer 11

the sister chromatids are arranged at the metaphase plate

-Because of crossing over in meiosis I, the two sister chromatids of each chromosome are no longer genetically identical

Question 12

Anaphase 2

Answer 12

pull apart sister chromatids

Question 13

Telophase 2 and Cytokinesis

Answer 13

the chromosomes arrive at opposite poles

Question 14

What are 3 factors for genetic variation?

Answer 14

• Independent assortment
• Crossing over
• Random fertilization

Question 15

Independent assortment

Answer 15

each pair of chromosomes sorts maternal and paternal homologues into daughter cells independently of the other pairs