meiosis

Question 1

meiosis

Answer 1

4 haploid gametes are produced from one diploid cell

Question 2

interphase i

Answer 2

• DNA replication takes place in synthesis phase
• chromosomes are replicated, making pairs of sister chromatids

Question 3

prophase i

Answer 3

• homologous chromosomes pair up
  
  • homologous pairs (bivalent)
• crossing over can take place
  
  • results in the exchange of alleles between non-sister chromatids

Question 4

metaphase i

Answer 4

• homologous pairs align at the equator
• random orientation

Question 5

anaphase i

Answer 5

• homologous pairs separates
  
  • reduction division
  • non-disjunction can occur here
• spindle fibre contract
• centromere do not split

Question 6

telophase i

Answer 6

• new nuclei are formed
  
  • nuclei contain pairs of sister chromatids, but no homologous pairs (bivalent)
• spindle fibre break down
• nuclear membrane reform
• cytokinesis begins

Question 7

interphase ii

Answer 7

no dna replication

Question 8

prophase ii

Answer 8

no crossing over

Question 9

metaphase ii

Answer 9

sister chromatids align at the equator

Question 10

anaphase ii

Answer 10

• centromere is split + sister chromatids are separated
  - non-disjunction can occur here

Question 11

telophase ii

Answer 11

new nuclei are formed and cytokinesis begins. four haploid gamete cells are reproduced