The sex of the future baby depends on the father. From their mother, a baby always receives the X-chromosome and from father either an X-chromosome (which means it will be a girl) or a Y-chromosome (which means it will be a boy).
If a man has a lot of brothers in his family, he will have more sons and if he has a lot of sisters, he will have more daughters. Only some men have a relatively equal number of X- and Y-chromosomes in their sperm and they are equally likely to have boys or girls.
Y-chromosomes have fewer genes than X-chromosomes and some of them are responsible for the development of male genitals. This is why a boy is more likely to look like his mother. When it comes to girls, they receive X-chromosomes from both parents, so it’s impossible to predict what they will look like.
Condition of their teeth
If a father visits dentists often, his children are very likely to have dental problems. Even though the shape and size of teeth can be inherited from either parent, a father’s genes are still dominant.
So, if a father has bad teeth, the child is likely to have the same problems too.