You visited us 1 times! Enjoying our articles? Unlock Full Access!

Prophase I

Prophase of t...

Question

Prophase of the first meiotic division is typically longer and complex. It is subdivided into $5$ phases: leptotene, zygotene, pachytene, diplotene and diakinesis. Which of the following statements is not correct of these phases?

The formation of synaptonemal complex is seen during zygotene stage.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

The stage of pachytene is characterized by appearance of recombination nodules.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Diplotene stage is marked by terminalisation of chiasmata.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

The compaction of chromosomes continues throughout the leptotene.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Diplotene stage is marked by terminalisation of chiasmata.
Meiosis is the type of division in which a diploid cell divides to give rise to four haploid gametes. The terminalization of chiasmata takes place during the diakinesis stage of meiosis, not j the diplotene stage.
So, the correct answer is 'Diplotene stage is marked by terminalisation of chiasmata.'

Suggest Corrections

Similar questions

	Column I		Column II
A	Leptotene	1	Terminalisation of chiasmata
B	Zygotene	2	Dissolution of the synaptonemal complex
C	Pachytene	3	Crossing over takes place
D	Diplotene	4	Formation of synaptonemal complex
E	Diakinesis	5	Condensation of chromosome

Regarding the assertion and reason; choose the correct option_____.

Assertion [A]: Prophase I of Meiosis I is the longest phase during the formation of gametes.

Reason [R]: It has five sub-stages Leptotene, Zygotene, Pachytene, Diplotene and

Diakinesis; during which the number of chromosomes is doubled.

Z y g o t e n e \to L e p t o t e n e \to P a c h y t e n e \to D i p l o t e n e \to D i a k i n e s i s

D i a k i n e s i s \to Z y g o t e n e \to L e p t o t e n e \to P a c h y t e n e \to D i p l o t e n e

L e p t o t e n e \to Z y g o t e n e \to P a c h y t e n e \to D i p l o t e n e \to D i a k i n e s i s .

\to

\to

\to

\to

\to

\to

\to

\to

\to

\to

\to

\to

\begin{matrix} Column A & Column B A & Diplotene & i & Appearance of recombination nodule and recombination between homologous chromosomes B & Diakinesis & ii & Dissolution of the synaptonemal complex and formation of the chiasmata C & Zygotene & iii & Compaction of chromosomes D & Pachytene & iv & Terminalisation of the chiasmata E & Leptotene & v & Synapsis and formation of the bivalent \end{matrix}

Join BYJU'S Learning Program