Q. In which stage of the first meiotic division, two sister chromatids are formed?
A) Leptotene
B) Zygotene
C) Pachytene
D) Diplotene
Explanation
In pachytene substage of meiosis-I, the paired homologous chromosomes divide into sister chromatids. Thus, each bivalent is composed of four chromatids and known as tetrad.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.