Gregor Mendel's experiments? How do two parents with short fur have a offspring with long fur?

Question

What letters would be used to represent the genotype of these parents?

Answer 1

Rr Rr

Answer 2

A capital letter is generally used to denote the dominant allele and a lower-case letter for the recessive allele.  So, if the allele for short fur is S (dominant allele) and the allele for long fur is s (recessive allele), then parents that have the short fur phenotype, but are heterozygous in genotype (Ss) could have offspring of a different phenotype:

Ss  x  Ss

offspring are:

SS (short fur), 25% chance

Ss (short fur), 50% chance

ss (long fur), 25% chance