What type of inheritance does red-green color blindness exhibit?

Red-green color blindness is a classic example of X-linked recessive inheritance. This means that the gene responsible for this condition is located on the X chromosome, one of the two sex chromosomes. In males, who have one X and one Y chromosome, having a single recessive allele on the X chromosome will result in the expression of the color blindness phenotype. In contrast, females have two X chromosomes, so they would need to inherit two copies of the recessive allele (one from each parent) to express the condition. If a female has only one copy of the allele, she would be a carrier but not exhibit symptoms of color blindness because the normal allele on her other X chromosome can compensate.

The inheritance pattern explains why color blindness is more prevalent in males than females, as they only require one affected X chromosome to express the trait, while females would need to inherit it from both parents. This genetic mechanism underlies the male-biased expression of X-linked traits, including red-green color blindness.