Waec Biology Past Questions and Answers

Question 1981:

• WAEC 2020

The diagram below is an illustration of a cross between plants A and B of the same species. Study it and answer the question below;


If the F1 generation are plants with high yield and resistance, the genotype of the F1 generation plants would be

A. YYRR
B. YyRr
C. YyRr
D. Yyrr

Question 1982:

• WAEC 2020

A child that can receive blood donation from anybody belongs to the blood group

A. O
B. A
C. B
D. AB

Question 1983:

• WAEC 2020

Variation which exhibits a wide range from one extreme to the other is

A. Phenotypic variation
B. Discontinuous variation
C. Continuous variation
D. Genotypic variation

Question 1984:

• WAEC 2020

Measurements of height and weight of students in a class show

A. Discontinuous variation
B. Continuous variation
C. Shortness is more prevalent
D. Fatness is less prevalent

Question 1985:

• WAEC 2020

Which of the following statements about chromosomes is correct?

A. All the chromosomes of a species are the same shape
B. The number present in a specie is constant
C. They are neatly arranged in a cytoplasm
D. They bear ribosomes on their outer membranes