Cell division - Part 3: Meiosis

Question 1

prophase I

Answer 1

• homologous chromosomes condense and undergo synapsis (gene-for-gene pairing)
• each pair forms a bivalent
• nuclear envelope breaks down

Question 2

crossing over

Answer 2

exchange of genetic material between homologous chromosomes

Question 3

chiasma

Answer 3

the contact point of the crossing over

Question 4

recombinant chromatids

Answer 4

has a combination of maternal and paternal genes that did not exist before the crossover

Question 5

prometaphase I

Answer 5

• spindles attach to kinetochores on the chromosomes

Question 6

metaphase I

Answer 6

homologous pairs line up in the middle of the cell

Question 7

kinetochores

Answer 7

orient side-by-side (mono-orientation)

Question 8

anaphase I

Answer 8

homologous chromosomes separate and go to opposite sides of the cell

Question 9

telophase I and cytokinesis

Answer 9

daughter cells are ready to move to prophase II

Question 10

prophase II

Answer 10

• chromosomes condense
• nuclear envelope breaks down

Question 11

prometaphase II

Answer 11

spindles attach to kinetochores of chromosomes

Question 12

metaphase II

Answer 12

chromosomes align in the middle of the cell

Question 13

anaphase II

Answer 13

sister chromatids separate and go to opposite ends of the cell

Question 14

telophase II and cytokinesis

Answer 14

• nuclear envelope reforms
• cell splits