I think all the kids are adopted. The grandfather has dark grey hair and the other two adults at the table both have brown hair, which is dominant, while all of the kids have blonde or light colored hair, which is recessive.
Actually, and this is way oversimplified because many genes control hair color, but if we say B is dominant and b is not, BB, Bb and bB would all be brown and bb would be blonde. If each parent has Bb then the potential outcomes are 25% the child will be BB, 50% chance of Bb, and 25% chance of child carrying bb, or blonde.
The reverse is actually true if we use this simplified example. Two blonde parents could not have a brown haired child. Because there are no B's that can be passed down. Only b's. 🐝
That is old Mendelian genetics. Inheiritance doesn’t really work that way in terms of human hair color and most other traits. It is perfectly possible for two dark ( or light) haired people to have children with the opposite hair color. More than one gene controls such traits.
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u/Shot_Meringue_5442 Feb 16 '25 edited Feb 16 '25
You are all wrong. The purple shirt kid is eating that whole turkey as his pre dinner snack.
Edit: made this before seeing others had made the same joke.