Some orchids of the variety White Ghost are homozygous for a dominant
allele F of a gene responsible for fuschia flower color and are also
homozygous for the dominant allele A of a gene for anther length.
(A=long anthers, a=short anthers).  The presence of A prevents the
expression of F.   Another variety of the same orchid species, called
Casper, is homozygous recessive for both flower color and anther
length.  What proportion of the F2 offspring would be expected to have
fuschia flowers if you crossed a White Ghost with a Casper?