wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Recombination occurs during _______ stage of meiosis-I.

A
leptotene
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
pachytene
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
zygotene
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
diplotene
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B pachytene
The prophase of meiosis I is divided into five stages: leptotene, zygotene, pachytene, diplotene, diakinesis. Leptotene stage marks the arrangement of chromatin fibres into thin, long strands. During the zygotene stage the synapsis of homologous chromosomes takes place, along with the formation of synaptonemal complexes. Pachytene marks the recombination of genes and crossing over. Diplotene is marked by the formation of chiasma. Terminalisation of chiasmata occurs in diakinesis.
In the pachytene stage, the process of exchange of fragments of non-sister chromatids of homologous chromosomes occurs. The process is referred to as recombination. It is during this process that there is a tendency of the genes on the same chromosome to get separated provided they are distantly located.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon