HEREDITY AND VARIATIONS - Jamb Biology Past Questions and Answers

Question 81:

• JAMB 2007

An example of a sex linked trait is the

A. Ability to grow long hair in females
B. Colour of the skin in humans
C. Ability to roll the tongue
D. Possession of facial hair in adult humans

Question 82:

• JAMB 2007

Use the diagram above to answer this question.
If the dogs are offspring of a monohybird cross and the gene G for grey head is dominant cross over its allele g, the individual whose genotype is likely to be gg is

A. Ll
B. L
C. IV
D. Lll

Question 83:

• JAMB 2007

Use the diagram above to answer this question.
Which of the following will be true of dog ll which lost its tail in an accident if it mates with dog lll.

A. None of its offspring will be born without a tail
B. 3/4 of its offspring will be born without tails
C. All its offspiring will be born without tails
D. 1/4 of its offspring will be born without tails

Question 84:

• JAMB 2007

In the diagram, the organelle responsible for heredity is

A. Iii
B. Iv
C. Ii
D. I

Question 85:

• JAMB 2008

Genetically modified food products have not become universally accepted because

A. They are not tasty as others produced by conventional means
B. They are usually costlier than others produced by conventional means
C. Their effects on human consumers is not yet fully understand
D. The technology can be applied only in developed countries