X-Linked Recessive Inheritance


- X-linked recessive inheritance is a genetic inheritance pattern in which the gene responsible for a trait or disorder is located on the X chromosome.

- In humans, females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).

- These traits primarily affect males due to their single X chromosome.

-Inheritance Pattern:

  •  X-linked recessive traits are more commonly expressed in males because they have only one X chromosome.
  • For a male to exhibit an X-linked recessive trait, he needs to inherit a single copy of the recessive allele from his mother.
  • In contrast, females must inherit two copies of the recessive allele (homozygous recessive) to express the trait, as they have two X chromosomes.