Question

which two characteristics of a disorder help to categorize it as autosomal recessive?
males and females can both be carriers of this disorder.
females can be carriers of this disorder, but males cannot.
an affected father can only transmit this disease to daughters.
it is expressed when a person has a single mutated allele of a gene.
it is expressed only when a person has two mutated alleles of a gene.

Explanation:

In autosomal recessive disorders, both males and females can be carriers as the genes are on autosomes (not sex - linked). Also, the disorder is expressed only when an individual has two mutated alleles (homozygous recessive), not with a single mutated allele.

Answer:

Males and females can both be carriers of this disorder.
It is expressed only when a person has two mutated alleles of a gene.