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
correct option: a
Linkage refers to the presence of two different genes on the same chromosome
Users' Answers & Comments42
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%
correct option: a
Users' Answers & Comments43
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
correct option: a
Users' Answers & Comments44
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
correct option: c
Users' Answers & Comments45
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
correct option: c
Users' Answers & Comments46
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%
correct option: b
Users' Answers & Comments47
Which of the following traits may be considered in marriage counseling?
A
Height
B
Fingerprints
C
Rhesus factor
D
Colour of skin
correct option: c
Users' Answers & Comments48
Which of the following structures is only formed during cell division in animal cells?
A
Cell memberane
B
Cytoplasm
C
Centrosome
D
Ribosome
correct option: c
Users' Answers & Comments49
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
correct option: b
Users' Answers & Comments50
Which of the following features is used by chameleons to escape predation?
A
fearsome appearance
B
coiling tail
C
offensive smell
D
adaptive colouration
correct option: d
Users' Answers & Comments