Waec Biology Past Questions and Answers

Question 1511:

• WAEC 2013

A man's blood group is AB. What is the probability of the man giving birth to a child with blood group O?

A. 0%
B. 25%
C. 50%
D. 100%

Question 1512:

• WAEC 2013

When a man who is Rh-positive marries a woman who is Rh-negative, there will be incidence of

A. Still births
B. Sicklers
C. Albinos
D. Living children

Question 1513:

• WAEC 2013

The gene that is only located on X-choromosome is said to be

A. Expressed in females only
B. Defective
C. Sex-linked
D. Expressed in males only

Question 1514:

• WAEC 2013

If a boy has blood type O and his mother has blood type A,what is the genotype of his father?

A. BB
B. AA
C. AO
D. AB

Question 1515:

• WAEC 2013

A man's who suffers from haemophilia marries a woman who is a carrier, what percentage of their children are likely to be haemophilie?

A. 25%
B. 50%
C. 75%
D. 100%