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WAEC questions for "Biology :: Biology of Heredity (Genetics)"
Q1
Hormones are transported around the mammalian body by
A
water
B
nerves
C
blood
D
osmosis
E
diffusion
Q2
Which of the following is a definition of heredity? It is the
A
non-resemblance of closely related organisms
B
total absence of parental traits in offspring
C
absence of variation in organisms
D
transfer of characteristics from parents ton offspring
E
cause of infantile mortality
Q3
Which of the following is not a reason why an offspring looks different from its parents?
A
Random reorganization of chromosome during gamete formation
B
Existence of multiple alleles in organisms
C
Formation of chiasmata in chromatids during meiosis
D
Mutation which gives rise to new combination of gene
E
Mitosis of the zygote produces new combination of chromosomes
Q4
The pair of genes expressed in a heterozygous individual is described as
A
allele
B
chromatid
C
dominant gene
D
centrosome
E
chromomere
Q5
Which of the following determines a normal male offspring?
A
X
B
Y
C
XX
D
XY
E
YY
Q6
What is the theoretical probability that a normal male child will be born?
A
1/2
B
1/4
C
1/3
D
1
E
2/3
Q7
Which of the following is the least safe method of child bearing ?
A
spermicide creams
B
contraceptive pills
C
barriers such as condoms
D
intrauterine device
E
the withdrawal method
Q8
Which of the following is not a continuous variation?
A
Height of plants
B
Skin colour
C
Ability to roll tongue
D
Length of fingers
E
Leaf size
Q9
Spermatogenesis and Oogenesis are both terms used to describe
A
mitosis
B
meiosis
C
mating
D
implantation
E
gametogenesis
Q10
Which of the following is the carrier of hereditary material?
A
Centriole
B
Cytoplasm
C
Nucleolus
D
Chromosome
E
Lysosome
Q11
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 reality
C
complete dominance is always possible
D
incomplete dominance is not possible
E
hybrids exist in living organisms
Q12
Which of the following diseases or disorders can be prevented by the application of the knowledge of heredity through marriage counseling?
A
Sickle cell anaemia
B
Haemophillia
C
Diabetes mellitus
D
Colour blindness
E
River blindness
Q13
Which of the following statements is not correct about sex-determination?
A
Females contribute half of the sex chromosomes
B
Males contribute an X or Y chromosome
C
Females contribute only the X chromosome
D
The sex of an individual is determined by the contribution of the male and female
E
Females alone determine the sex of a child
Q14
Which of the following is the precise located of the gene?
A
Chromosome
B
Centresome
C
Centriole
D
Ribosome
E
Endoplasmic reticulum
Q15
How many chromosomes are found in the human ovum?
A
46
B
23
C
33
D
13
E
43
Q16
If a black guinea pig of genotype BB, is crossed with a white guinea pig of genotype BB, what will be the phenotype of the F1 generation?
A
Half of the offspring would be black while the other half would be white
B
All the offspring would be black
C
All the offspring would be grey
D
One-third of the offspring would be black while two-third would be white
E
Two-thirds of the offspring would be black while one-third would be white
Q17
Which of the following structures is a protective adaptive feature of the Agama lizard to terrestrial habitat?
A
Claws
B
Gular fold
C
Scaly skin
D
Nuchal crest
E
Tail
Q18
The phenomenon whereby some organisms with certain features get established in an environment is known as
A
partial selection
B
artificial selection
C
natural selection
D
mutation
E
colonization
Q19
Who formulated the theory of natural selection in evolution?
A
Louis Pasteur
B
Robert Hooke
C
Jean Lamarck
D
Mathias Schleiden
E
Charles Darwin
Q20
The wing of a bat and that of a bird, the flippers of a whale and the fins of a fish are examples of
A
adaptive radiation
B
vestigial structures
C
continuous variation
D
convergent evolution
E
divergent evolution
Q21
Which of the following statements about the modification of a pentadactyl fore-limb is not correct?
A
Wings are modified for flying in birds
B
Flippers are modified for grasping in sharks
C
Legs are modified for walking and running in antelopes
D
Arms are adapted for grasping and holding in human beings
E
Flippers are modified for swimming in whales
Q22
The process by which plants and animals are modified in structure, physiology and behavior in order to survive is known as
A
evolution
B
adaptation
C
succession
D
aggregation
E
hibernation
Q23
The evidence for evolution can be obtained from the following except?
A
fossil
B
anatomy
C
histroy
D
embryology
E
taxonomy
Q24
Group instincts or social behavior is not displayed in
A
soldier ants
B
bees
C
chickens
D
weaver birds
E
termites
Q25
The inability of some individuals to perceive the taste of some substances is an example of
A
individual adaptation
B
physiological variation
C
morphological variation
D
morphological adaptation
E
physical variation
Q26
The idea that new organs or characteristics develop in organisms when there is need for them was postulated by
A
Charles Darwin
B
Jean Lemarck
C
Gregor Mendel
D
Wallace
E
Louis Pasteur
Q27
Increasing specialization of structure and function among animals of the same class or order for survival in new and different environments is called
A
Adaptive radiation
B
Phylogeny
C
Homology
D
Analogy
E
Ontogeny
Q28
Which of the following is not an evidence of evolution?
A
Fossil
B
Anatomy
C
Embryology
D
Genetics
E
Behaviour