No, the sex of the embryo is determined at fertilization and depends on whether the sperm that fertilizes the egg carries either an X or a Y chromosome (sperm only carry one or the other, because they are “haploid” cells). All eggs carry an X, because females are XX.
No, the sex of the embryo is determined at fertilization and depends on whether the sperm that fertilizes the egg carries either an X or a Y chromosome (sperm only carry one or the other, because they are “haploid” cells). All eggs carry an X, because females are XX.