A) zygotene
B) pachytene
C) diplotene
D) diakinesis
Correct Answer: B
Solution :
Synapsis is the pairing of homologate chromosomes during the zygocene stage if meiosis. Each pair is called bivalent. One of the pair comes from the male parent and one from the female parent. Each member of the pair is of the same length, their centromeres are in the same positions and they usual; have the same number of genes arranged the same order. After xygotene stage, cell entered in pachytene stage in which the bivalents become spiralled, shortened and thickened. In diplotene stage, chiasma is formed, wind indicates the completion of crossing overall beginning of separation of chromosomes. In diakinesis, chromosomes become more condensed, bivalents more evenly disiributed in nucleus and migrate towards periphery. The nucleolus disappears and nuclei membrane is broken completely.
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