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9 Cards in this Set

  • Front
  • Back
leptotene
first part of prophase I in meiosis
- chromosomes begin to condense
zygotene
2nd part of prophase I in meiosis
- homologous chromosomes begin to pair (synapsis)
synapsis
pairing of homologues
pachytene
3rd part of prophase I in meiosis
tetrad or bivalent sometimes visible
bivalent
- pair of synapsed chromosomes
aka tetrad
tetrad
- 4 chromatids in synapsis
aka bivalent
diplotene
4th part of prophase I in meiosis
- synapsed c’somes begin to separate
- homologues remain together at chiasmata
chiasmata
apparent points of crossing over
diakinesis
5th part of prophase I in meiosis
- homologues segments that are not connected by
chiasmata move farther apart
- spindle begins to form
- nuclear envelope breaks down