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Q.
A double equatorial plate is formed in
NTA AbhyasNTA Abhyas 2020
Solution:
Metaphase I of meiosis I- In this phase, the bivalents arrange themselves on the equator of the bipolar spindle. The arms of the chromosomes are usually short and lie horizontally on the equator. The centromeres slightly project towards the periphery. Since there are two centromeres in each bivalent, the centromeres of all the bivalents produce a double metaphasic or equatorial plate.
The distribution of bivalents is random so that the individual paternal and maternal chromosomes can face either of the two poles of the spindle. Each chromosome gets attached to the region of the centromere. The fibres of the homologous chromosomes are always in opposite directions.