Andrew Huberman· PhD
That is, whether or not it has double X chromosomes-- so one X chromosome from mom, one X chromosome from dad because the egg was fertilized by a sperm that had an X sex chromosome, that 23rd chromosome-- or whether or not the offspring is male, whether or not it has the X chromosome from mom, because it's always going to be the X chromosome in that egg, and a Y chromosome from the sperm that fertilized that particular egg.