Waec Biology 1992 Past Questions and Answers

Question 36:

• WAEC 1992

The table below indicates the result of an experiment during which grains of different colours in two maize cobs were counted
Maize Cob Colours of Maize Grains
White Pink Red
l. 30 60 30
II. 50 99 49
Which of the following ratios agrees with the result?

A. 9:3:3
B. 1:2:1
C. 1:3:1
D. 2:1:1
E. 2:3:2

Question 37:

• WAEC 1992

One of the factors that must be considered for sate blood transfusion is

A. Social class of the donor
B. Age of the recipient
C. Rhesus factors of the donor and the recipient
D. Nationality of the donor
E. Weight of the recipient

Question 38:

• WAEC 1992

One of the major criticisms against Mendelian laws is that they do not recognise that

A. One trait is often controlled by many pairs of genes
B. Single factor inheritance is never a reality
C. Complete dominance is always possible
D. Incomplete dominance is not possible
E. Hybrids exist in living organisms

Question 39:

• WAEC 1992

Identical twins inherit their genes from

A. The same ovum and different sperms
B. The same sperm and different ova
C. Different sperms and many ova
D. The same ovum and the same sperm
E. Many ova and many sperms

Question 40:

• WAEC 1992

The offspring produced when pure strains interbreed is descried as

A. Dominance
B. Phenotype
C. Allele
D. Genotype
E. Hybrid