Which of the following is true of a mutation that produces an allele that is dominant? (A) It would be expected to cause death - HSC - SSCE Biology - Question 7 - 2001 - Paper 1

A mutation that produces a dominant allele typically shows its effect in a heterozygous genotype. In such cases, the dominant allele masks the effect of the recessive allele, leading to a distinct observable phenotype. Thus, this option accurately describes a key characteristic of dominant mutations.