Dominant allele disorders are single gene disorders which take effect in the heterozygous state.

An autosomal disorder is one which is caused by a gene or genes on an autosome - a non-sex chromosome.

Dominant means that if one allele for the disorder is present, then the person will have the disorder. For example, if H is the allele for Huntington's disease and a person has Hh - they will have the disease.

Examples of autosomal dominant disorders are; Huntington's disease, Romano-Ward syndrome, Timothy syndrome and Jackson-Weiss syndrome.

When the gene is dominant and the traits are autosomal.

the disorder is usually either autosomal recessive or autosomal dominant. they are passed down from the parents to the next generation. autosomal reccessive diseases only are when one parent gives one reccessive allele and the other parent gives the other reccessive allele. A dominant autosomal disorder can be inherited with one or two of the alleles.

Chromosomes can be divided into autosomes and sex chromosomes. The sex chromosomes (eg X and Y in humans) carry genes concerned with sex determination. The remaining chromosomes are called autosomes. They carry genes which are the same in males and females.

Aberrations are changes or mutations in the chromosomes. So autosomal aberrations are mutations in the non-sex chromosomes.