Waec Biology 2008 Past Questions and Answers

Question 46:

• WAEC 2008

Which of the following statements about phenylthiocarbamide (PTC) is not correct?

A. Some people BHG the taste of PTC to be bitter
B. Others find this substance to be tasteless
C. Ability to taste this chemical is inheritable
D. Ability to taste the chemical is hot inheritable

Question 47:

• WAEC 2008

Which of the following characters is not an example of discontinuous variation?

A. Skin color
B. Fingerprint
C. Ability to roll tongue
D. Sex type

Question 48:

• WAEC 2008

Which of the following human traits in a class of school children may give an approximate normal distribution curve when the variation is plotted?

A. Blood groups
B. Ear shapes
C. Sex distribution
D. Heights

Question 49:

• WAEC 2008

The observable characteristics of an individual usually resulting from the interaction between the gene composition and the environment is referred to as

A. Allele
B. Genotype
C. Phenotype
D. Chromosome

Question 50:

• WAEC 2008

The sudden change in a gene structure or chromosome number in an organism likely to cause an inheritable change in the phenotype is known as

A. Migration
B. Mutation
C. Mitosis
D. Meiosis