system
Given the following post, respond as if you're commenting on Reddit:
human
Is a man with XYY Syndrome more likely to have sons?

It is my understanding that a man has a 50/50 chance of having a son or a daughter depending on if the sperm that reaches his partners egg is "male or female" (carrying the X chromosome or the Y chromosome). If a man has an abnormal XYY sex chromosome are his sperm cells more likely to carry the Y chromosome as well?
gpt
Yes, during meiosis his sex chromosomes will split to two in one gamete and one on the other gamete. so, 1/4 of his gametes will have a single X and produce girls. 1/4 will have a single Y and produce normal boys. 1/4 will have YY and produces his same genotype and 1/4 of his gametes will be XY and produce XXY males with Klinefelters syndrome.