If two parental organisms of genotype pp and PP were crossed, what percentage of F1 offspring would be homozygous recessive? (Assume simple Mendelian pattern of inheritance and unlinked alleles.)

Answer 1

Zero, all offspring would be Pp.

Do you know how to use a Punnett square?

http://en.wikipedia.org/wiki/Punnett_square

Answer 2

75