An individual who is heterozygous for traits of flower colour and height would be
AaBb
A = allele 1
for flower colour
a = allele 2 for flower colour
B = allele 1 for height
b = allele 2 for height
An AaBb individual can produce the following allelic combinations in their gametes.
AB
Ab
aB
ab
There are 4 unique allele combinations that this individual can produce. Assuming these alleles are not sex linked and are located on autosomal chromosomes.