Question

I know this is a weird question but when I learn a a concept for the first time I always have weird questions.

Q- As this is true= Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome.So only the haploid cells resulting from meiosis can be called sex cells in this case.

Then what is the name of the cell which is known to be diploid and divides into 4 daughter cells in meiosis? If it is a sex cell itself, then how can it be diploid if all sex cells are haploid.

Answer 1

The cell that we are talking about is the fertillize egg which is formed by the fusion of male and female gametes. Since, two haploid cells fuses, the resulting cell is diplontic. In the fertilized egg, there would be 2 chromosomes which are in pair(diplontic). This diploid cell is called zygote. It further undergoes mitosis and meiosis to develop into an offspring.
I hope your doubts are clarified.