NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
Which of the following is correct about metaphase-I?
Options
- ABivalents are arranged at equator
- BUnivalents are arranged at equator
- CNon-homologus chromosomes forms pair
- DSpindle fibers are attached at chromomere
Correct answer
A. Bivalents are arranged at equator
Step-by-step solution
During the prophase of meiosis I, homologous chromosomes pair and form synapses. The paired chromosomes are called bivalents. The bivalent has two chromosomes and four chromatids, with one chromosome coming from each parent. The bivalent chromosomes align on the equatorial plate during metaphase I. The microtubules from the opposite poles of the spindle attach to the kinetochore of homologous chromosomes.