What indicates a trait may skip a generation in an Autosomal Recessive Pedigree?

What indicates a trait may skip a generation in an Autosomal Recessive Pedigree?

• A. Affected individuals in every generation
• B. Having affected parents but unaffected offspring
• C. The presence of the trait in both parents
• D. Only one parent carrying the trait

Answer: (B)

In an autosomal recessive pedigree, a trait is typically considered to skip a generation when affected parents can have unaffected offspring. This occurs because both parents can be carriers of the recessive allele without expressing the trait themselves. If both parents carry one copy of the recessive allele, it is possible for an offspring to inherit two dominant alleles, resulting in an unaffected phenotype. This situation allows the trait to seemingly "skip" a generation, as the affected individuals may only appear in subsequent generations when two carriers produce an affected child. The presence of unaffected offspring from affected parents is a clear indicator of the recessive inheritance pattern.

In an autosomal recessive pedigree, a trait is typically considered to skip a generation when affected parents can have unaffected offspring. This occurs because both parents can be carriers of the recessive allele without expressing the trait themselves. If both parents carry one copy of the recessive allele, it is possible for an offspring to inherit two dominant alleles, resulting in an unaffected phenotype. This situation allows the trait to seemingly "skip" a generation, as the affected individuals may only appear in subsequent generations when two carriers produce an affected child. The presence of unaffected offspring from affected parents is a clear indicator of the recessive inheritance pattern.