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(A) Chiasmata are the $X$-shaped structures formed between non-sister chromatids of homologous chromosomes during the process of crossing over in the

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Length of chromosomes

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(A) Chiasmata are the $X$-shaped structures formed between non-sister chromatids of homologous chromosomes during the process of crossing over in the $Pachytene$ stage of $Meiosis-I$.The number of chiasmata is directly proportional to the length of the chromosomes. Longer chromosomes have a higher probability of undergoing multiple crossover events,leading to a greater number of chiasmata compared to shorter chromosomes.

Column-$I$	Column-$II$
$1$. Leptotene	$p$. Homologous chromosomes are separated
$2$. Diakinesis	$q$. Nucleolus reappears
$3$. Pachytene	$r$. Chromosomes can be observed in a microscope
$4$. Anaphase-$I$	$s$. Nucleolus disappears
	$t$. Crossing over

The number of chiasmata depends on the ........

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During gamete formation,the enzyme recombinase participates during

During gamete formation,the enzyme recombinase participates during

Choose the correct pair.
Column-$I$ Column-$II$
$1$. Leptotene $p$. Homologous chromosomes are separated
$2$. Diakinesis $q$. Nucleolus reappears
$3$. Pachytene $r$. Chromosomes can be observed in a microscope
$4$. Anaphase-$I$ $s$. Nucleolus disappears
$t$. Crossing over

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

In which stage does the process of crossing over occur?

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The number of chiasmata depends on the ........

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During gamete formation,the enzyme recombinase participates during

During gamete formation,the enzyme recombinase participates during

Choose the correct pair.Column-$I$Column-$II$$1$. Leptotene$p$. Homologous chromosomes are separated$2$. Diakinesis$q$. Nucleolus reappears$3$. Pachytene$r$. Chromosomes can be observed in a microscope$4$. Anaphase-$I$$s$. Nucleolus disappears$t$. Crossing over

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

In which stage does the process of crossing over occur?

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Choose the correct pair.
Column-$I$ Column-$II$
$1$. Leptotene $p$. Homologous chromosomes are separated
$2$. Diakinesis $q$. Nucleolus reappears
$3$. Pachytene $r$. Chromosomes can be observed in a microscope
$4$. Anaphase-$I$ $s$. Nucleolus disappears
$t$. Crossing over