Question
Biology Question on Meiosis
The enzyme recombinase is required at which stage of meiosis?
A
Pachytene
B
Zygotene
C
Diplotene
D
Diakinesis
Answer
Pachytene
Explanation
Solution
Pachytene is characterized by the appearance of recombination nodules, the sites at which crossing over occurs between non-sister chromat ds of the homologous chromosomes. Nodules contain multienzyme complex called recombinase. Recombinase is made of endonuclease, exonuclease, unwindase, R-protein, etc.