From a parent with a phenotype of normal eye color, several children with normal vision were born and one boy

From a parent with a phenotype of normal eye color, several children with normal vision were born and one boy is color blind. how to explain this? what are the genotypes of parents and children?

The gene for color blindness is recessive, linked to the X chromosome. Let’s designate it as X (a), healthy allele as X (A).

Father’s genotype X (A) Y, as he is healthy. The mother is a carrier of the gene, her genotype is X (A) X (a).

Let’s make a crossing scheme:

R: X (A) X (a) x X (A) Y – parents;

G: X (A), X (a) x X (A), Y – possible gametes;

F: X (A) X (A) – 25% healthy girl;

X (A) X (a) – 25% healthy girl (carrier of the gene for color blindness);

X (A) Y – 25% healthy boy;

X (a) Y – 25% sick boy.