Consider this human pedigree for a vision defect.

What is the most probable mode of inheritance of the disease? Identify any discrepancies between the pedigree and your proposed mode of transmission, and provide possible explanations for these exceptions. 

Verified step by step guidance

1. Examine the pedigree chart to identify affected and unaffected individuals. Affected individuals are typically shaded, while unaffected individuals are not.
2. Determine if the trait is more common in one sex. If the trait appears predominantly in males, consider X-linked recessive inheritance.
3. Check if the trait skips generations. If it does, this might suggest a recessive mode of inheritance.
4. Look for any affected individuals with unaffected parents. This could indicate an autosomal recessive trait, where both parents are carriers.
5. Identify any discrepancies, such as affected females in an X-linked recessive pattern, and consider possible explanations like new mutations or incorrect pedigree information.