Also sex is defined by a pair of chromosomes, at conseption sex cells merge, each of them has only 23 chromosomes, the resulting cell has 46, which is why they say that sex is defined at conception, you can’t determine the sex at this stage without destroying the single cell (zygote), but the chromosomes will not change nevertheless
Also sex is defined by a pair of chromosomes, at conseption sex cells merge, each of them has only 23 chromosomes, the resulting cell has 46, which is why they say that sex is defined at conception, you can’t determine the sex at this stage without destroying the single cell (zygote), but the chromosomes will not change nevertheless