lecture 30 - sexual reproduction ii

Question 1

what is the primary purpose of meiosis?

Answer 1

produce four haploid cells for sexual reproduction

Question 2

what are the two consecutive divisions in meiosis called?

Answer 2

meiosis i and meiosis ii

Question 3

separation of sister chromatids

Answer 3

meiosis ii

Question 4

separation of homologous chromosomes

Answer 4

meiosis i

Question 5

what is crossing over and when does it occur?

Answer 5

exchange of genetic material between non-sister chromatids during prophase i

Question 6

what stage does synapsis and crossing over occur in?

Answer 6

prophase i

Question 7

homologous pairs align at the metaphase plate

Answer 7

metaphase i

Question 8

homologous chromosomes separate

Answer 8

anaphase i

Question 9

sister chromatids

Answer 9

two identical copies of a chromosome

Question 10

prophase ii

Answer 10

spindle fibres attach to chromosomes

Question 11

metaphase ii

Answer 11

chromosomes align at the metaphase plate

Question 12

anaphase ii

Answer 12

sister chromatids separate

Question 13

what structure forms to facilitate crossing over?

Answer 13

synaptonemal complex

Question 14

what is chiasma

Answer 14

a visible sight where crossing over has occurred