What pattern of inheritance does this pedigree chart represent? (squares are male/circles are females) a) y-linked traits b) x-linked dominant traits c) x-linked recessive traits d) autosomal recessive traits

The correct answer is an X-linked recessive trait.

X-linked recessive inheritance refers to a mode of inheritance in which a mutation in a gene on the X-chromosome makes the phenotype to be articulated in males (as they exhibit one X and one Y chromosome, they are essentially hemizygous for the mutation of the gene) and in females who are homozygous for gene mutation, consider zygosity.