2014 - WAEC Biology Past Questions & Answers - page 4

31
Characteristics that exhibit continuous variation are generally controlled by
A
a single gene
B
recessive genes
C
epistatic interactions
D
multiple genes
CORRECT OPTION: d
32
Differences in characteristics that exist among individuals of the same species is referred to as
A
genetics
B
dominance
C
hybird
D
variation
CORRECT OPTION: d
33
Which of the following traits is not a morphological variation in humans?
A
Ability to taste PTC
B
Colour
C
Fingerprints
D
Size
CORRECT OPTION: a
34
Which of the following statements about chromosomes is correct?
A
All the chromosomes of a species are the same in shape
B
the bear number present in a species is constant
C
they are neatly arranged in the eytoplasm
D
They bear ribosomes on their outer membranes
CORRECT OPTION: b
35
A small stem from a hibiscus plant was placed in a nutrieent medium, and it developed into a new plant. The new plant was reproduced
A
asexually with different genotype from the parent plant
B
sexually with a different genotype from the parent plant
C
asexually with the same genotype as the parent plant
D
sexually with the same genotype as the parent plant
CORRECT OPTION: c
36
The F1 generation of a cross between a red cock and white hen were all red because the gene for the
A
white colour did not segregate
B
red colour was dominant
C
white colour was dominant
D
red colour was recessive
CORRECT OPTION: b
37
Which of the following diseases can be inherited?
A
pneumonia
B
AIDS
C
sickle cell anaemia
D
goitre
CORRECT OPTION: c
38
In dihybrid inheritance, Mendel considered
A
a pair of contrasting characters
B
two pairs of contrasting characters
C
three pairs of contrasting characters
D
four pairs of contrasting characters
CORRECT OPTION: b
39
The main reason for nuptial flight in termites is to
A
escape unfavourable conditions
B
search for food
C
form new colonies
D
communicate with one another
CORRECT OPTION: c
40
Which of the following organisms is not a social insect?
A
Termites
B
Ants
C
Grasshoppers
D
Bees
CORRECT OPTION: c
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