Science states that the mother contributes an X chromosome, while the father contributes either an X or a Y chromosome. If the father contributes a Y chromosome, the fetus will develop into a male (excluding anomalies); if the father contributes an X chromosome, the fetus will develop into a female (excluding anomalies).
According to Wikipedia’s entry on “XY sex-determination system,” it states,
In humans and many other species of animals, the father determines the sex of the child. In the XY sex-determination sys[tem, the father contr]ibutes either an X chromosome or a Y chromosome, resulting in female (XX) or male (XY) offspring, respectively.
Since the Lord Jesus Christ had no human biological father, how is the determination of his male gender explained by Catholic apologists?
Edit: If you watch this YouTube video, @2:57, you will see that Tim Staples (from Catholic Answers) offers some speculation on the subject, but does not go any further. I am curious if there are some Catholic apologists who have actually discussed the matter in depth.