Q10 · 2025 · Paper 1Unclassified1 mark
QUESTION 10
In humans, sex-linked recessive traits are more common in
(A) males, because they have a Y chromosome.
(B) females, because they have two X chromosomes.
(C) males, because they have only one X chromosome.
(D) females, because they do not have a Y chromosome.
WORKED SOLUTION
1 markAnswer C
OFFICIAL ANSWERC
QCAA awards 1 mark for selecting option C.
Correct option from the official QCAA answer key.