Jonas got a chance to explain the sex determination of his expected Springtime sibling. He follows the process of the egg and sperm combining using trains as visual aids. Jonas is working on a follow up to part I that will include the evolution of the sex chromosome over a few hundred million years and the factors that are genetically switched that actually help the fetus form into a boy or girl. Jonas has been spending a few too many nights out on the town so this has delayed the production process for part II. Stay tuned.