Question

a pedigree chart like this one is characteristic of ______________ disorders.
dominant allelic
autosomal recessive
sex - linked recessive
sex - linked dominant

Explanation:

To determine the type of disorder, we analyze the pedigree. In sex - linked recessive disorders, males are more likely to be affected (since they have one X chromosome). Looking at the pedigree, affected individuals are mostly male, which is a key characteristic of sex - linked recessive inheritance. Dominant allelic disorders would show more affected individuals across generations with dominant inheritance patterns (not matching here). Autosomal recessive disorders affect males and females equally (not seen here as mostly males are affected). Sex - linked dominant would have different inheritance patterns (affected females passing it more, not matching the male - predominant pattern here).

Answer:

C. sex - linked recessive