Select all of the following that describe the inheritance of an autosomal dominant disorder.Multiple select question.expressed in homozygous recessive individuals but not in heterozygous individualstypically present in every generationNOT typically present in every generationexpressed in homozygous dominant individuals and heterozygous individuals

The correct answers are:

• typically present in every generation
• expressed in homozygous dominant individuals and heterozygous individuals

Explanation:

Autosomal dominant disorders are caused by mutations in genes on the autosomes (the non-sex chromosomes). They are "dominant" because an individual only needs to inherit one copy of the mutated gene for the disorder to be expressed.

1. "Typically present in every generation": This is true for autosomal dominant disorders. Because only one copy of the mutated gene is needed for the disorder to be expressed, it is likely that at least one individual in each generation of a family will have the disorder.

2. "Expressed in homozygous dominant individuals and heterozygous individuals": This is also true for autosomal dominant disorders. Whether an individual has two copies of the mutated gene (homozygous dominant) or just one copy of the mutated gene and one normal gene (heterozygous), the disorder will be expressed.

The other two options are not correct:

• "Expressed in homozygous recessive individuals but not in heterozygous individuals": This describes autosomal recessive disorders, not autosomal dominant disorders. In autosomal recessive disorders, an individual must inherit two copies of the mutated gene for the disorder to be expressed.

• "NOT typically present in every generation": This is the opposite of what is true for autosomal dominant disorders. As mentioned above, autosomal dominant disorders are typically present in every generation.