EVERYDAY SCIENCE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Select the correct option. Column I Column II A. Synapsis aligns homologous chromosomes (i) Anaphase II B. Synthesis of RNA and protein (ii) ZygoteneC. Action of enzyme recombinase (iii) G2 phase D. Centromeres do not separate but chromatid (iv) Anaphase I Move towards opposite poles (v) Pachytene
A
A-(i), B-(ii), C-(v), D-(iv)
B
A-(ii), B-(iii), C-(iv), D-(v)
C
A-(ii), B-(i), C-(iii), D-(iv)
D
A-(ii), B-(iii), C-(v), D-(iv)
Explanation: 

Detailed explanation-1: -Complete answer: Zygotene is the second stage of prophase-I in which the process of pairing between homologous chromosomes at end to end takes place, which is known as synapsis.

Detailed explanation-2: -Synapsis is the pairing of two chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them. Synapsis takes place during prophase I of meiosis.

Detailed explanation-3: -The tight pairing of the homologous chromosomes is called synapsis. In synapsis, the genes on the chromatids of the homologous chromosomes are aligned with each other. The synaptonemal complex also supports the exchange of chromosomal segments between non-sister homologous chromatids in a process called crossing over.

Detailed explanation-4: -Synapsis of homologous chromosomes takes place during prophase I of meiosis.

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