[Judith Anne]

It is not transmitted like a disease. It’s inherent in us as humans with a human sinful father.

That is such a strange belief. Sin doesn't come from both parents, but ONLY the father? Makes no sense, since both are equally sinners. However, it seems like a convenient belief for a cult that insists that Mary didn't need to be preserved from all stain of sin to be the Mother of God. No wonder.

[Cronos]

Sin doesn't come from both parents, but ONLY the father?

As you correctly point out that makes no sense.

If the sin is in the genetic material, then every female from Adam's daughters onwards would have this genetic flaw, just as every male would.

Since genetic material flows from both mother and father, hence if one says that Jesus took only 1/2 His genetic material from His mother, He would still then be getting this "flawed", sinful genetic material.