We can aggree to disagree. It is per egg and that is what a Punnett Square represents. People do extrapolate it out, but it is incorrect to do so.

A Punnett Square is what genetic odds are calculated from. That square and its associated odds do not change from one egg to the next. The odds are the same for each egg.... 1:4. If I hit 99 straight BEL's my odds are still 1:4 (no more, no less) the last egg will be a BEL. Genetic odds are not based on what the last egg produced. Prove to me the Punnett Squre changes for one egg given the last outcome? The Punnett Square sits there on the wall and cares not what the last child/egg was.

Would you tell parents that have a Sickle Cell child that their odds are any different that their 2nd child may have Sickle Cell? That Punnett Square does not care if the last child had Sickle Cell......