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Question
Diplotene phase of meiosis is characterised by
a. desynapsis
b. complete terminalisation of chiasmata
c. dissolution of synaptonemal complex starts
d. complete disappearance of nuclear membrane and nucleoli
e. crossing over
Diplotene phase of meiosis is characterised by
a. desynapsis
b. complete terminalisation of chiasmata
c. dissolution of synaptonemal complex starts
d. complete disappearance of nuclear membrane and nucleoli
e. crossing over
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Solution
The correct option is C a and c
Prophase-I of meiosis-I includes five stages of which diplotene is the fourth stage.
During diplotene, the homologous chromosomes start to separate due to dissolution of synaptonemal complex and this is called desynapsis. It is opposite of synapsis.
Synapsis is pairing of homologous chromosomes that occurs during zygotene stage.
Complete terminalisation of chiasmata occurs during diakinesis stage. Complete disappearance of nuclear membrane and nucleoli occur by the end of diakinesis.
Crossing over is observed during pachytene stage.
Prophase-I of meiosis-I includes five stages of which diplotene is the fourth stage.
During diplotene, the homologous chromosomes start to separate due to dissolution of synaptonemal complex and this is called desynapsis. It is opposite of synapsis.
Synapsis is pairing of homologous chromosomes that occurs during zygotene stage.
Complete terminalisation of chiasmata occurs during diakinesis stage. Complete disappearance of nuclear membrane and nucleoli occur by the end of diakinesis.
Crossing over is observed during pachytene stage.
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