HEREDITY AND VARIATIONS - Jamb Biology Past Questions and Answers

Question 121:

• JAMB 2018

A man who is heterozygous for the disease haemophilia marries a woman who is double recessive for haemophilia. What percentage of their offspring would have the disease?

A. 0%
B. 25%
C. 50%
D. 75%

Question 122:

• JAMB 2019

Which of the following is not a transmitable character in plants

A. Habit of growth
B. Resistance to environmental factors
C. Life span
D. Haemophilia

Question 123:

• JAMB 2019

Inheritable character/features possessed by an organism can be referred to as

A. Genes
B. Locus
C. Traits
D. Allelo morphs

Question 124:

• JAMB 2019

One of the following is a process of transmission of hereditary characteristics by chromosomes

A. Genes relating to the same character occupy identical locations on the chromosomes
B. Separation of homologous chromosomes into four daughter cells
C. Separation of gametes during fertilization
D. Dictating the formation of a protein by a gene in a chromosome

Question 125:

• JAMB 2019

Which of the following is an example of discontinous variatio?

A. The range in height of a pea plant from 30cm to 50cm
B. Offsprings including two male cats and three female cats
C. The colour of pear plants grown in the dark
D. The adult body weight ranging from 50kg to 95kg