Pachytene - Crossing over mediated by recombinase enzyme. Zygotene - Pairing of homologous chromosomes G2 phase - Synthesis of RNA and protein Anaphase I - Centromeres do not separate but chromatids move towards opposite poles.

Correct Option: A

Pachytene - Crossing over mediated by recombinase enzyme. Zygotene - Pairing of homologous chromosomes G2 phase - Synthesis of RNA and protein Anaphase I - Centromeres do not separate but chromatids move towards opposite poles.

Meiosis is a process (discovered by German biologist, Oscar Hertwig) where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells - sperm in males, eggs in females. Crossing over is the process by which two chromosomes, exchange some distal part of their DNA. This process occurs in the Pachytene stage of Prophase I of meiosis.

Correct Option: A

Meiosis is a process (discovered by German biologist, Oscar Hertwig) where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells - sperm in males, eggs in females. Crossing over is the process by which two chromosomes, exchange some distal part of their DNA. This process occurs in the Pachytene stage of Prophase I of meiosis.

In mitotic anaphase, the sister chromatids separate from each other and begin to move towards the opposite poles.

Correct Option: D

In mitotic anaphase, the sister chromatids separate from each other and begin to move towards the opposite poles.

During metaphase, the centomeres of the chromosome lie on the equatorial plate according to their size and spatial arrangement. So it is the best time to count the number and study the morphology of chromosomes.

Correct Option: B

During metaphase, the centomeres of the chromosome lie on the equatorial plate according to their size and spatial arrangement. So it is the best time to count the number and study the morphology of chromosomes.

Colchicine is a mitotic poison which inhibits the formation of spindle fibres.

Correct Option: B

Colchicine is a mitotic poison which inhibits the formation of spindle fibres.