(B) During the $pachytene$ stage of $prophase-I$ in meiosis,the phenomenon of crossing over occurs.Crossing over is the exchange of genetic material b

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(B) During the $pachytene$ stage of $prophase-I$ in meiosis,the phenomenon of crossing over occurs.Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes.This process is mediated and catalyzed by an enzyme complex known as $recombinase$.$Recombinase$ facilitates the breaking and rejoining of $DNA$ strands,ensuring genetic recombination.

Class 11 Biology Cell Cycle and Cell Division Meiosis

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In meiosis,crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme.

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A
Phosphorylase
B
Recombinase
C
Transferase
D
Polymerase

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Class 11 Questions

Class 11

Biology Questions

Chapter

Cell Cycle and Cell Division

Subtopic

Meiosis

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In $Meiosis-I$,a bivalent is an association of

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The formation of complex structures like synaptonemal complexes during the pairing of homologous chromosomes is observed by which of the following?

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Identify the correctly matched pair.

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Match List-$I$ and List-$II$ and select the correct answer using the code given below in the lists:
List-$I$ (Phase of meiosis) List-$II$ (Event that occurs)
$1$. Prophase $I$ Crossing over occurs
$2$. Metaphase $I$ Sister chromatids migrate to opposite poles
$3$. Anaphase $I$ Homologous chromosomes line up at the equator in pairs

List-$I$ (Phase of meiosis)	List-$II$ (Event that occurs)
$1$. Prophase $I$	Crossing over occurs
$2$. Metaphase $I$	Sister chromatids migrate to opposite poles
$3$. Anaphase $I$	Homologous chromosomes line up at the equator in pairs

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