WAEC Biology Past Questions & Answers - Page 142

706.

The gene that is only located on X-choromosome is said to be

A.

expressed in females only

B.

defective

C.

sex-linked

D.

expressed in males only

Correct answer is C

No explanation has been provided for this answer.

707.

When a man who is Rh-positive marries a woman who is Rh-negative, there will be incidence of

A.

still births

B.

sicklers

C.

albinos

D.

living children

Correct answer is A

No explanation has been provided for this answer.

708.

A man's blood group is AB. What is the probability of the man giving birth to a child with blood group O?

A.

0%

B.

25%

C.

50%

D.

100%

Correct answer is A

No explanation has been provided for this answer.

709.

In genetics, linkages refer to the linking of genes of the

A.

same chromosomes

B.

different chromosomes

C.

same nucleus

D.

different nuclei

Correct answer is A

A linkage refers to the presence of two different genes on the same chromosome.

710.

Which of the following statements is not a reason to conserve wildlife?

A.

Attracting tourists into the country

B.

Serving as a source of food

C.

Serving as a source of income

D.

increasing the amount of rainfall

Correct answer is D

No explanation has been provided for this answer.