Duchenne's Muscular Dystrophy is never transmitted from father to son. It is a good example of?

Duchenne's Muscular Dystrophy (DMD) is classified as an X-linked recessive disorder, which is why the correct answer is highlighted. This condition is caused by mutations in the dystrophin gene located on the X chromosome.

In terms of inheritance, males (who have one X and one Y chromosome) are primarily affected by the disease, as they inherit a single X chromosome from their mothers. If that X chromosome carries the mutation for DMD, they will express the disease. Females, who have two X chromosomes, can be carriers if they inherit one affected X chromosome from their mothers. Even if they have one normal X chromosome, the presence of one mutated allele often does not lead to the disease phenotype due to the phenomenon of X-inactivation.

The fact that DMD is "never transmitted from father to son" aligns with its X-linked nature. A father passes on his Y chromosome to his son, meaning he cannot pass on the X chromosome that contains the mutation for the disease.

This genetic mechanism has critical implications for family planning, genetic counseling, and understanding the patterns of inheritance in families affected by DMD. Since the condition is linked to a gene on the X chromosome, it specifically highlights the traits of