Assertion : During zygotene,chromosomes show | vedclass

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(A) During the zygotene stage of Prophase-$I$ of meiosis,homologous chromosomes undergo pairing,a process known as synapsis.Each pair of homologous ch

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) During the zygotene stage of Prophase-$I$ of meiosis,homologous chromosomes undergo pairing,a process known as synapsis.Each pair of homologous chromosomes is referred to as a bivalent or a tetrad.Because the homologous chromosomes pair up,the number of observable units (bivalents) is half the original diploid number of chromosomes $(2n)$.Therefore,the Assertion is correct as chromosomes appear as bivalents,and the Reason is also correct as it accurately describes the numerical reduction of observable chromosomal units during this stage.

Assertion : During zygotene,chromosomes show bivalent stage.
Reason : Bivalent is half the number of chromosomes.

Similar Questions

$A$ : Anaphase-$I$ is the actual phase of reduction in the number of chromosomes.
$R$ : Homologous chromosomes move to the opposite poles with both their chromatids.

In which stage of meiosis does crossing over begin?

If there are $30$ chromosomes in $G_1$ phase,then what will be the number of bivalents in the zygotene stage?

Choose the correct sentences.
$1.$ Meiosis is an important process for evolution.
$2.$ In meiosis-$II$,the mother cell is haploid.
$3.$ In anaphase-$II$,homologous chromosomes are separated.
$4.$ After meiosis,each daughter cell has the same $DNA$ strands.

The stage between the two meiotic divisions is called:

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Assertion : During zygotene,chromosomes show bivalent stage.Reason : Bivalent is half the number of chromosomes.