Waec Biology 1988 Past Questions and Answers

Question 41:

• WAEC 1988

Assuming that ‘A’ is gene for normal skin and it is dominant, while ‘a’ is gene for albinism and it is recessive,
what is the likely genotype of a couple which had 50% normal and 50% albinos?

A. AA,Aa
B. AA,aa
C. Aa, Aa
D. Aa, aa
E. AA,AA

Question 42:

• WAEC 1988

Which of the following is not a constituent of DNA?

A. Purine
B. Phosphate
C. Cystocine
D. Deoxyribose
E. Uracil.

Question 43:

• WAEC 1988

Which of the following best describes the homologous chromosomes? They are

A. A product of the division of a chromosome
B. Two identical chromosomes from each parent
C. Chromosomes arranged on spindle fibres during cell division
D. Daughter chromatides formed during meiotic division
E. Chromosomes during telophase of mitotic division

Question 44:

• WAEC 1988

The haploid number of chromosomes in man is

A. 48
B. 46
C. 42
D. 24
E. 23

Question 45:

• WAEC 1988

If a cross is made between a pure-breeding red flowered plant and a pure-breeding white flowered plant
where R is dominant for red flower and r is recessive for white, the most likely result of F generation will be

A. 75% red flowers and 25% white flowers
B. All red flowers
C. 75% white flowers and 25% red flowers
D. 50% red flowers and 50% white flowers
E. All white flowers