A plant breeder is trying to develop a deep purple violet. She knows the purple violets she has can be PP or Pp for the purple color. She crosses two purple violets hoping to produce a deeper color. Under what circumstances can she be sure that the resulting offspring will all be purple?

Both parents must be PP.

Both parents must be Pp.

At least one parent must be Pp.

At least one parent must be PP.

Question

A plant breeder is trying to develop a deep purple violet. She knows the purple violets she has can be PP or Pp for the purple color. She crosses two purple violets hoping to produce a deeper color. Under what circumstances can she be sure that the resulting offspring will all be purple?

 Both parents must be PP.

 Both parents must be Pp.

 At least one parent must be Pp.

 At least one parent must be PP.

anonymous · Answer

If you cross PP with PP, then for sure you can get purple violent
If you bross with Pp with Pp, there is 1/4 of chance to get pp (which is not purple violet)
If at least one parent is Pp or PP, that means it can be pp too, so it is not correct

anonymous · Answer

oh, if one parent is PP, then you can also get purple
since PP x pp will give you Pp offsprings