Recombinase enzyme catalyzes the exchange of short pieces of DNA between two long DNA strands, particularly the exchange of homologous regions between the paired maternal and paternal chromosome in prophase - I of meiosis I.

Correct Option: C

Recombinase enzyme catalyzes the exchange of short pieces of DNA between two long DNA strands, particularly the exchange of homologous regions between the paired maternal and paternal chromosome in prophase - I of meiosis I.

During zygotene, a substage of Prophase I of meiosis I, chromosomes start pairing together by a process called synapsis. Such paired chromosomes are called as homologous chromosomes. A complex structure i.e., synaptonemal complex is formed by a pair of synapsed homologous chromosomes called a bivalent or a tetrad.

Correct Option: B

During zygotene, a substage of Prophase I of meiosis I, chromosomes start pairing together by a process called synapsis. Such paired chromosomes are called as homologous chromosomes. A complex structure i.e., synaptonemal complex is formed by a pair of synapsed homologous chromosomes called a bivalent or a tetrad.

The enzyme recombinase is required at Pachytene stage of meiosis. It catalyzes the exchange of short pieces of DNA between two long DNA strands, particularly the exchange of homologous regions between the paired maternal and paternal chromosomes.

Correct Option: A

The enzyme recombinase is required at Pachytene stage of meiosis. It catalyzes the exchange of short pieces of DNA between two long DNA strands, particularly the exchange of homologous regions between the paired maternal and paternal chromosomes.

Meiosis II is an equational division which is meant for maintaining the haploid number produced by meiosis I and separating the two chromatids of a chromosome.

Correct Option: C

Meiosis II is an equational division which is meant for maintaining the haploid number produced by meiosis I and separating the two chromatids of a chromosome.

Synapsis → Crossing over → Terminalisation of chiasmata → Disappearance of nucleolus.

Correct Option: A

Synapsis → Crossing over → Terminalisation of chiasmata → Disappearance of nucleolus.