Jamb Biology 1990 Past Questions and Answers

Question 31:

• JAMB 1990

The part of the ear that is concerned with balance is the

A. Semi-circular canals
B. Incus
C. Malleus
D. Eustachian tube

Question 32:

• JAMB 1990

In organism where the 2nd number of chromosomes is 16, the number of chromosomes in each gamete will be

A. 32
B. 16
C. 8
D. 4

Question 33:

• JAMB 1990

What will be the result of the first filial generation (F₁) and the second filial generation (F₂) of a mono-hybrid cross between pure line normal-winged Drosophilia flies and pure line short-winged flies, if the gene for the normal wing is dominant?

A. F₁ flies all short-winged and F₂ flies all normal-winged
B. F₁ flies all normal and F₂ flies all short-winged
C. F₁ flies all short-winged and three-quarters of F₂ flies are short-winged
D. F₁ flies all normal-winged and three-quarters of F₂ flies are normal-winged

Question 34:

• JAMB 1990

What stage during cell division is represented in the figure above?

A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

Question 35:

• JAMB 1990

An individual in the AB blood group is a universal recipient for blood donation because

A. All the red blood cells do not carry antigen
B. All the red blood cells carry antigen
C. All the red blood cells carry antigen
D. There are no anti-A and anti-B antibodies in the serum