Why is the mother the carrier?

The mother is often considered the carrier of genetic traits because she contributes one of the two sets of chromosomes to her offspring, which includes mitochondrial DNA and X chromosomes. In many genetic conditions, particularly those linked to the X chromosome, mothers can be carriers without showing symptoms, passing on the trait to their children. Additionally, maternal health and environment can significantly influence fetal development, making her role crucial in the genetic expression and overall health of the child.