What is the probability of having a baby with blue eyes if both parents are heterozygous with brown eyes?

Let us denote the gene that causes blue eyes in humans by the letter k, and the gene for brown eyes by the letter K.
Both parents, according to the condition, are brown-eyed in phenotype. They have a heterozygous genotype. Let us write them, according to the introduced designations, as Кк.
They are capable of producing two types of germ cells – k and K.
The offspring will be represented by the following options:
heterozygous children with brown eyes (Kk) – 50%;
homozygous children with brown eyes (KK) – 25%;
homozygous children with blue eyes (kk) – 25%.
Parents: Kk * Kk
Gametes: K, k; K, k
Offspring: KK; 2Kk; kk
Answer: The probability of having a baby with blue eyes in two parents with heterozygous eyes is 25%.