Answer:
The probability will be 75% (each parent has one bad allele and one good allele). In consequence, the probability to have an unaffected offspring will be 25%.
Explanation:
Huntington's chorea is an autosomal dominant disease characterized by different brain disorders that include, among others, dementia, rigidity and ophthalmoplegia. Huntington's chorea is an inherited disease that is produced by the mutation on chromosome 4, thereby affecting brain functioning. This mutation is caused by a trinucleotide repeat in the HTT gene, which is a gene highly expressed in many tissues.
