Statement $X$: During the process of meiosis,the genetic material replicates only once.
Statement $Y$: During interkinesis,there is no replication of genetic material.

$A$ cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate,and thus the cell contains a higher number of chromosomes compared to other dividing cells. This would result in:

The number of chromatids in a chromosome at anaphase is

$(1)$ Give scientific reason: Meiosis is called reductional division.
$(2)$ Give scientific reason: Mitosis is necessary for growth,development,and repair of the cell.

Select the correct statements.
$A$. Tetrad formation is seen during Leptotene.
$B$. During Anaphase,the centromeres split and chromatids separate.
$C$. Terminalization takes place during Pachytene.
$D$. Nucleolus,Golgi complex and $ER$ are reformed during Telophase.
$E$. Crossing over takes place between sister chromatids of homologous chromosomes.
Choose the correct answer from the options given below:

Agglutination of chromosomes is caused by a mitotic poison called