In the context of genetic disorders, consider the following : A woman suffers from colour blindness while her husband does not suffer from it. They have a son and a daughter. In this context, which one of the following statements is most probable) correct ?

Colour blindness (most commonly red–green) is an X‑linked recessive condition. An affected woman must have two mutant X chromosomes (XcXc) while her normal husband is X+Y. All children inherit an X from their mother regardless of sex [1], so every child receives a mutant X from her. Sons receive the father’s Y and thus are XcY — they will express the recessive colour‑blind trait. Daughters receive the father’s normal X and the mother’s mutant X, becoming X+Xc — heterozygous carriers who typically do not show the recessive phenotype. Therefore the most probable outcome is an affected son and an unaffected (carrier) daughter (option 4) [2].

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 8: Heredity > 8.2.4 Sex Determination > p. 132
2. [2] https://www.ncbi.nlm.nih.gov/books/NBK557383/