Question

Identify the type of inheritance shown in the diagram.

• A. dominant X-linked
• B. recessive X-linked
• C. dominant Y-linked
• D. recessive Y-linked

Answer 1

The correct option is A dominant X-linked

X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome. All fathers that are affected by an X-linked dominant disorder will have affected daughters but not affected sons.

Note: Y-linked disease cannot transfer to the daughters. Also, for X-linked recessive disease, there should be at least Carrier parents.

Therefore, the option (A) is correct.