def check_chrom_name(chrom_name):
    """Check validity of the input chrom_name."""

    expected_chroms = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11',
                       '12', '13', '14', '15', '16', '17', '18', '19', '20',
                       '21', '22', 'X', 'Y', 'MT']

    if chrom_name in expected_chroms:
        return True
    else:
        return False