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Waec Biology 1993 Past Questions and Answers

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Waec 1993 Biology Past Questions

Question 46:


The table below indicates the result of an experiment during which grains of different colours in two maize cobs were counted
Maize cob White Pink Red
I 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 47:


One of the factors that must be considered for safe 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 48:


One of the major criticisms against ‘Mendelian laws is that they do not recognize 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 49:


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 50:


The offspring produced when pure strains interbreed is described as

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






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