meiosis

Question 1

what kind of cells does meiosis produce

Answer 1

haploid cells

Question 2

what happens in prophase 1

Answer 2

• chromatin condenses into chromosomes, the spindle apparatus forms and the nucleoli and nuclear membrane disappear
• homologous chromosomes come together and intertwine in a process called synapsis
• crossing over occurs

Question 3

what happens in metaphase 1

Answer 3

-homologous pairs align at the equatorial plane and each pair attaches to a separate spindle fiber at the kinetochore

Question 4

what happens in anaphase 1

Answer 4

-homologous pairs separate and are pulled to opposite poles of the cell (disjuction)

Question 5

what happens during disjunction

Answer 5

the paternal chromosome separates from its homologue of maternal origin and either chromosome can end up in a daughter cell

Question 6

when does nondisjunction occur

Answer 6

when cells don’t separate appropriately during meiosis

Question 7

what is the result of nondisjunction

Answer 7

daughter cells have an incorrect number of chromosomes

Question 8

what happens in telophase 1

Answer 8

nuclear membrane forms around each nucleus

Question 9

what happens in the second meiotic division

Answer 9

chromosomes aligns at the equator, separate and move to opposite poles and are surrounded by a re-formed nuclear membrane

Question 10

is meiosis 2 preceded by chromosomal replication

Answer 10

no