Patrick recently married patti a cute star girl he met at a local dance he is considered a purebred for his tall head shape(t) which is dominat over a short head (t) if patti is a short headed starlady what type of heads would their children have?

Tall head shape

Explanation:

Purebred means that the person has a homozygous genotype. So in the case of Patrick, his genotype would be homozygous dominant, TT. Patti is also homozygous because short head shape is a recessive trait and the only way for it to come out would be if she were homozygous recessive. Now we put that in a Punnet and let's see the results:

TT x tt

    T     T

t   Tt    Tt

t   Tt    Tt

So as you can see all the offsprings have a genotype of Tt. Since tall head shape is dominant it is what will be expressed so all the children would have a tall head shape.