HEREDITY AND VARIATIONS - Jamb Biology Past Questions and Answers

Question 71:

• JAMB 2004

An evidence of the relationship between living organisms and their extinct relatives can best be obtained from

A. Embryology
B. Comparative anatomy
C. Comparative physiology
D. Palaeontology

Question 72:

• JAMB 2005

Which of the following is the best explanation for a child who is phenotypically short and born of two tall parents

A. The father possesses a gene for shortness
B. The mother posesses a gene for shortness
C. Nature makes the child short
D. Both parents possess gene for shortness

Question 73:

• JAMB 2005

A yellow maize is crossed with a white maize and the first filial generation produce yellow maize only. The white trait is said to exhibit

A. Dominance
B. Recessiveness
C. Codominance
D. Incomplete dominance

Question 74:

• JAMB 2006

The two normal types of sex chromosomes are

A. XXY and XYY
B. XX and XYY
C. XY and XXY
D. XXand XY

Question 75:

• JAMB 2006

One advantage of variation in a species population is that individuals

A. With favoured traits become dominant
B. Easily reach their reproductive age
C. Are easily recognised by mates
D. Are better adapted to changes