Waec Biology Past Questions and Answers

Question 811:

• WAEC 2002

When Mendel crossed round seeds with wrinkled seeds of Pea Plant, what was the ratio of wrinkled seeds
to round seeds in the F₂ plants?

A. 3 : 1
B. 2 : 1
C. 1 : 3
D. 1 : 2

Question 812:

• WAEC 2002

Which of the following is not a morphological variation in human beings?

A. Size
B. Blood groups
C. Colour
D. Fingerprints.

Question 813:

• WAEC 2002

The name given to a sudden change in a gene or chromosome that can be passed on to the offspring is

A. Inheritance
B. Linkage
C. Alleles
D. Mutation

Question 814:

• WAEC 2002

In humans, sex is determined by

A. Two homologous chromosomes
B. A dominant gene for maleness present in a male
C. Two similar sex chromosomes in the male and dissimilar in the female
D. The differences in the nature of the X and Y chromosomes in the male.

Question 815:

• WAEC 2002

A man with heterozygous genotype for blood group B marries a woman with heterozygous A, what percentage
(%) of their children would be universal donor?

A. 50%
B. 25%
C. 15%
D. 10%