Question

what is the allele for having no freckles if freckles is dominant and not having freckles is recessive?

Answer 1

ff

Answer 2

It is easiest if you start by assigning a notation (like a letter) to the gene. For example, the lower case f would indicate a recessive allele and big F would stand for a dominant allele.

Then write out the parents' genotypes using your new notation...

Answer 3

if F is the allele for having freckle

Answer 4

FF and Ff = Not having freckles
ff = having freckles.

Answer 5

So the only way you can have freckes is if you cross with parents that have either
Ff X ff or Ff X Ff

Answer 6

thanks guys!!