Why is almost impossible to measure directly the mutat ion rate in autosomal recssive alleles?

Measuring the mutation rate of autosomal recessive alleles directly is challenging because these alleles often do not manifest phenotypically in carriers, making it difficult to identify and track them in populations. Additionally, the rarity of specific mutations and the need for extensive genetic screening complicate direct measurement. Instead, researchers often rely on indirect methods, such as population genetics and pedigree analysis, to estimate mutation rates. These methods can provide insights but do not capture the full complexity of mutation dynamics.