An autosomal recessive disorder:

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An autosomal recessive disorder requires both parents to carry the gene for the disorder in order for it to appear in their children. If only one parent is a carrier, their children will not have the disorder but may be carriers themselves. The disorder is not limited to heterozygotes, as homozygotes for the recessive gene will also display the disorder. The frequency in males and females is not necessarily different, as it depends on the specific disorder. It is also not dominant in females, as dominance does not depend on gender.

An Autosomal Recessive Disorder