In gamete cell 20 chromosome so in Diploid cell 40 chromosome ...at the time of division or mitosis in Anaphase no. of chromosome double so 80 i think ..

Introduction:
To understand the number of chromosomes present in a diploid cell at mitotic anaphase, it is necessary to understand the process of cell division and the concept of haploid and diploid cells.

Cell Division:
Cell division is the process by which a single cell divides into two or more daughter cells. There are two main types of cell division: mitosis and meiosis.

Haploid and Diploid Cells:
Haploid cells contain a single set of chromosomes, while diploid cells contain two sets of chromosomes. In humans, haploid cells are sperm and egg cells, while diploid cells are all other cells in the body.

Mitosis:
Mitosis is the process by which a diploid cell divides into two identical diploid daughter cells. During mitosis, the chromosomes in the nucleus of the cell condense and become visible. The chromosomes then line up in the center of the cell and are pulled apart by spindle fibers. The cell then divides, creating two identical daughter cells.

Answer:
If an egg cell has 20 chromosomes, then a diploid cell would have 40 chromosomes. This is because diploid cells contain two sets of chromosomes, and the egg cell is a haploid cell with only one set.

During mitosis, the diploid cell would go through the process of chromosome condensation, alignment, and separation. At anaphase, the chromosomes would be pulled apart by the spindle fibers, and each daughter cell would receive an identical set of 20 chromosomes.

Conclusion:
In summary, a diploid cell at mitotic anaphase would have 20 chromosomes if the original cell was an egg cell with 20 chromosomes. It is important to understand the concept of haploid and diploid cells and the process of cell division to accurately determine the number of chromosomes present in a cell.