Heredity And Variations - Biology Jamb Past Questions and Answers

Question 36 :

• JAMB 1992

Woman do not suffer from colour blindness because

A. The trait is sex-linked
B. Only men are colour blind
C. The genes are recessive and sex-linked
D. The genes occur on both the X and Y chromosomes

Question 37 :

• JAMB 1992

The theory of natural selection was developed by

A. Lamarck and Darwin
B. Darwin and Wallace
C. Wallace and Mendel
D. Mendel and Larmack

Question 38 :

• JAMB 1993

On what structure are the units of inheritance situated?

A. Golgi bodies
B. Ribosomes
C. Chromosomes
D. Endoplasmic reticulum

Question 39 :

• JAMB 1993

Which of the following is an example of discontinuous variation observed in man?

A. Skin colours
B. Tongue rolling
C. Body weight
D. Height

Question 40 :

• JAMB 1993

In the illustration above, the genotypes of the offsprings are

A. 1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled
B. 1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
C. 2 homozygous smooth : 2 wrinkled
D. 3 heterozygous smooth : 2 wrinkled