In cats the allele for short fur (F) is dominant over the allele for long fur (f).
Two heterozygous cats are crossed shown in the pit Square below, using the punnets Square identify the genotypes that represent offspring with short fur
What is the probability of offspring having short fur
Punnett Square:
F f
F FF Ff
f Ff ff
So, the genotypes that represent offspring with short fur are FF and Ff.
The probability of offspring having short fur is 75% (3 out of 4 possible outcomes).