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2013 - WAEC Biology Past Questions and Answers - page 5

41

In genetics, linkages refer to the linking of genes of the

A
same chromosomes
B
different chromosomes
C
same nucleus
D
different nuclei
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42

A man's blood group is AB. What is the probability of the man giving birth to a child with blood group O?

A
0%
B
25%
C
50%
D
100%
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43

When a man who is Rh-positive marries a woman who is Rh-negative, there will be incidence of

A
still births
B
sicklers
C
albinos
D
living children
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44

The gene that is only located on X-choromosome is said to be

A
expressed in females only
B
defective
C
sex-linked
D
expressed in males only
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45

If a boy has blood type O and his mother has blood type A,what is the genotype of his father?

A
BB
B
AA
C
AO
D
AB
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46

A man's who suffers from haemophilia marries a woman who is a carrier, what percentage of their children are likely to be haemophilie?

A
25%
B
50%
C
75%
D
100%
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47

Which of the following traits may be considered in marriage counseling?

A
Height
B
Fingerprints
C
Rhesus factor
D
Colour of skin
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48

Which of the following structures is only formed during cell division in animal cells?

A
Cell memberane
B
Cytoplasm
C
Centrosome
D
Ribosome
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49

The function of the drone in a colony of bees is to

A
clean the cells
B
mate with the queen
C
protect the colony
D
lay eggs
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50

Which of the following features is used by chameleons to escape predation?

A
fearsome appearance
B
coiling tail
C
offensive smell
D
adaptive colouration
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