clef chin

There are no definites -- there are dominant and recessive traits, and while I dunno which a cleft chin is, even if it is dominant it doesn't mean that your son WILL have a cleft chin, just means it would be more likely.

My husband has one and my daughter seems to. (Smaller, but she's 4. We'll see.)

Looks like it is dominant, so more likely while still not definite. More info here:

http://www.bbc.co.uk/health/genes/disorders/dominant_4.shtml

http://www.thetech.org/genetics/ask.php?id=47

Dimples are apparent at birth--what else would you expect from a poking angel finger?

I have dimples (cheek)--and so does a first cousin. Neither my father, nor my mother, nor my aunt, nor my uncle have dimples.

My son had dimples.

My second husband has a cleft chin--none of his sons do. Neither his mother, nor his father, nor his sister nor either of his brothers do.

I have dimples, and also my 4 years nephew.None of the family does, that's funny when you smile

The facial features of your boyfriend are irrelevant... but the facial features of the child's FATHER have a chance of being passed on to offspring.