What proportion of homozygous individuals is obtained by crossing heterozygotes?

When crossing heterozygotes Aa x Aa in the offspring, the splitting AA: 2Aa: aa is obtained. Of these, 25% are homozygotes for the dominant trait and 25% are homozygotes for the recessive trait. The remaining 50% are heterozygotes. This judgment is valid for monohybrid crosses with complete or incomplete dominance. If we are talking about a dihybrid crossing of parental forms AaBb x AaBb, then the share of homozygotes is 12.5%: 6.25% for homozygotes for the dominant trait (AABB) and 6.25% for homozygotes for the recessive trait (aabb).