With our 3 year old daughter she did not point out the differences till she was 2 1/2 years old. She pointed out daddy was different, hubby turned bright red, I immediately jumped in and said daddy needs some privacy to shower and change lets go read a book, while hubby was "recovering" I briefly explained that boys and girls are different, that out of respect of others we don't touch their private areas and answered her few questions, ending with if you ever want to talk or tell me anything my ears were always opening for listening. My daughter still sees me naked, many times she says wants to grow up just like me with breasts and has seen hubby with just boxers on but no longer sees him naked.
We have also started the knock on a door before coming into the bedrooms or bathroom, mainly stressing respect that someone may want privacy if they say no to coming in.
With your daughter just turning 1 it may be another year before she might point it out, but every child is different so a good thing to be prepaid on how you and hubby want to handle it. Some households are completely open and could care less about being seen naked but that only works if everyone feels comfortable with it, while other households never see the parents naked, and others only see the same sex parent naked. So it is whatever you and your husband feel comfortable with and you may not know and until your daughter points something out.