Biology questions and answers

Biology Questions and Answers

How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.

856.

Genes that remain linked are those

A.

close to each other on the chromosomes

B.

on the same locus on the chromosomes

C.

on the homologous chromosomes

D.

that are allelic pairs

Correct answer is A

Linked genes are genes that are found near each other on the same chromosome.

858.

The greatest contribution to genetic studies was made by 

A.

Gregor Mendel

B.

Thomas Morgan

C.

Charles Darwin

D.

Robert Hooke

Correct answer is A

Gregor Mendel is considered the founder of modern science of genetics.

859.

Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor. Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.

What should the hospital have done to prevent X from showing the symptom described above? Patient X should have

A.

undergone an agglutination test

B.

been asked for the blood group

C.

been screened for HIV

D.

undergone malaria test

Correct answer is A

The basic technique in identification of the antigens and antibodies of blood groups is the agglutination test and can be done to prevent the clumping of the red blood cell. The symptom is due to clumping due to incompatible blood transfusion.