Below is an instruction from Human. Write a response.
    ### Instruction:
    Is Opitz G/BBB syndrome inherited ?
    ### Response:
    When caused by mutations in the MID1 gene, Opitz G/BBB syndrome has an X-linked pattern of inheritance. It is considered X-linked because the MID1 gene is located on the X chromosome, one of the two sex chromosomes in each cell. In males, who have only one X chromosome, a mutation in the only copy of the gene in each cell is sufficient to cause the condition.
    