Cell Cycle and Cell Division Question 43
43. In meiosis crossing over is initiated at [2016]
(a) Pachytene
(b) Leptotene
(c) Zygotene
(d) Diplotene
Show Answer
Answer : a
Hints & Solutions
(a) Meiosis is a process (discovered by German biologist, Oscar Hertwig) where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells sperm in males, eggs in females. Crossing over is the process by which two chromosomes, exchange some distal part of their DNA. This process occurs in the Pachytene stage of Prophase I of meiosis.
