Waec Biology 2012 Past Questions and Answers

Question 51:

• WAEC 2012

The following pairs of traits are examples of continuous and discontinuous variations respectively except

A. Eye Colour and body weight,
B. Height and blood group
C. Skin colour and fingerprints
D. Bodyweight and tongue rolling.

Question 52:

• WAEC 2012

Which of the following statements is true about the ABO blood group system?

A. Antigens are located on the surface of white blood cells
B. Antibodies are located in the blood plasma
C. Antibodies are located on the surface of red blood cells
D. Antigens are located in the blood plasma

Question 53:

• WAEC 2012

The classes of fingerprints in man are

A. Whorl, alternate, opposite and compound
B. Compound, loop, whorl! and alternate
C. Whorl, arch, compound and loop
D. Arch, simple, compound and opposite

Question 54:

• WAEC 2012

Which of the following diseases is transmittable through genes?

A. HIV /AIDS
B. Sickle cell anaemia
C. Diabetes
D. Presbyopia

Question 55:

• WAEC 2012

Two plants with red flowers were back crossed, which of the following results indicate that the plants are heterozygous
red flowers, where red flowers are dominant?

A. 75% red and 25% white
B. 50% red and 50% white
C. 100% white
D. 100% red