HEREDITY AND VARIATIONS - Jamb Biology Past Questions and Answers

Question 51:

• JAMB 1998

The correct increasing order of size for the cell components responsible for heredity is

A. Chromosome → DNA → nucleus → gene
B. DNA → gene → chromosome → nucleus
C. Chromosome → nucleus → DNA → gene
D. DNA → gene → nucleus → chromosome

Question 52:

• JAMB 1998

A sex-linked character cannot be passed on directly from

A. Father to son
B. Mother to daughter
C. Mother to son
D. Father to daughter

Question 53:

• JAMB 1998

The best explanation for the theories of natural selection is that

A. All organisms have equal capacity for survival in their habitats
B. Organisms have varying capacities for survival in their habitats
C. Organisms compete for resource and better competitors survive and thrive
D. Habitats allow only organisms that will not have to compete for survival

Question 54:

• JAMB 1999

If the offspring of a cross between a brown mouse (bb) and a black mouse (BB) are allowed to interbreed, how many different genotypes would result?

A. 2
B. 3
C. 4
D. 5

Question 55:

• JAMB 1999

The biological factor that is unique to each individual is the

A. DNA
B. Eye colour
C. Blood group
D. RNA