Waec Biology 2002 Past Questions and Answers

Question 51:

• WAEC 2002

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

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

Question 52:

• 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 53:

• 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 54:

• 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%

Question 55:

• WAEC 2002

The genes affecting the same trait and are located at the same position on the homologous chromosomes
are called

A. Autosomes
B. Alleles
C. Loci
D. Chromatids