First slide

Meiosis

Question

Tetrad of chromosome and tetrad of cell is observed in:

Moderate

A

Zygotene and Telophase I respectively
B

Zygotene and Cytokinesis II respectively
C

S-phase and Zygotene respectively
D

$G_{1}$ phase and Anaphase II

Solution

During zygotene chromosomes start pairing together and this process of association is called synapsis. The synapsis is accompanied by the formation of complex structure called synaptonemal complex. The complex formed by a pair of synapsed homologous chromosomes is called a bivalent or a tetrad.
Meiosis ends with telophase II, in which the two groups of chromosomes once again get enclosed by a nuclear envelope; cytokinesis follows resulting in the formation of tetrad of cells i.e., four haploid daughter cells

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