Question

Pachytene phase of meiosis is also characterized by

1. Chromosome condensation
2. Chromosome synapse
3. Tetrad
4. Crossing over
5. Chiasmata
6.Chromosome segregation

• A. 1, 2, 3 and 5
• B. 2, 4, 5 and 6
• C. 3 and 4
• D. 2, 4 and 6

Answer 1

The correct option is C 3 and 4

Leptotene - chromosome becomes visible - chromosome condensation
Zygotene - which homologous chromosomes begin to pair - Chromosome synapse
Pachytene - the paired chromosomes shorten and thicken, the two chromatids of each separate, and exchange of segments between chromatids may occur. (tetrad formation and crossing over)
Diplotene - The chiasmata are now visible and are the point at which the chromosomes are still held together. And then paired chromosomes begin to separate into two pairs of chromatids.
Diakinesis - when the separation of homologous chromosomes is complete and crossing over has occurred.
Pachytene is a phase of meiosis is characteristics by
3 and 4