Assertion : Diplotene is characterized by the | vedclass

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(B) Diplotene is the longest and most active subphase of prophase $I$ of meiosis.The beginning of diplotene is recognized by the dissolution of the sy

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If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

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(B) Diplotene is the longest and most active subphase of prophase $I$ of meiosis.The beginning of diplotene is recognized by the dissolution of the synaptonemal complex and the tendency of the recombined homologous chromosomes of the bivalents to separate from each other except at the sites of crossovers.These $X$-shaped structures are called chiasmata.Additionally,in the oocytes of some vertebrates,the diplotene stage can remain suspended for months or even years,a state known as dictyotene.Since both statements are factually correct but the duration of the stage does not explain why chiasmata are present,the correct option is $B$.

$I$. Leptotene	$A$. Chromosomes appear as clear bivalents/tetrads
$II$. Zygotene	$B$. Chromosomes appear like a thread (beaded appearance)
$III$. Pachytene	$C$. Chromosome condensation reaches its maximum
$IV$. Diakinesis	$D$. Synapsis of homologous chromosomes occurs

Assertion : Diplotene is characterized by the presence of chiasmata.
Reason : Diplotene can last for months and years in oocytes of some vertebrates.

Similar Questions

The beginning of which stage of prophase is marked by complete terminalisation of chiasmata and inhibition of $RNA$ synthesis?

The function of recombinase is found in which stage of meiosis?

The chromosome number is reduced in which phase of meiosis?

In which phase of $Meiosis-I$ are the interzonal fibers observed?

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Assertion : Diplotene is characterized by the presence of chiasmata.Reason : Diplotene can last for months and years in oocytes of some vertebrates.