Biology of Hereditory Generix Content - Biology of Hereditory
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WAEC questions for "Biology :: Biology of Hereditory"
Q1
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
Q2
The offspring produced when pure stains interbreed is described as
A
dominance
B
phenotype
C
allele
D
genotype
E
hybrid
Q3

From the cross above, which of the following F1 offspring does not belong to the father?

A

AA

B

AO

C

OB

D

OO

E

AB

Q4
Which of the following is a function of the chromosome?
A
Transmission of hereditary traits
B
Protein synthesis
C
Excretion
D
Energy production
E
Manufacture of enzyme
Q5
Which of the following is the unit of transmission of hereditary traits in living organisms?
A
Nucleus
B
Nucleolus
C
Gametes
D
Genes
E
Chromosomes
Q6
In an individual who is heterozygous for a particular character, the hereditary factor that is always expressed is described as
A
allele
B
sickle-cell gene
C
dominant gene
D
chromosome
E
sex-linked character
Q7
Which of the following statements best explains the meaning of homologous chromosomes?
A
product of division of chromosomes
B
Two identical chromosomes from each parent
C
chromosomes arranged on spindle fibre during cell division
D
Chromosomes arranged on the equatorial plate cell
E
Daughter chromatids in the first meiotic division
Q8
At which of the following stages of mitosis do the two daughter chromosomes separate completely?
A
early prophase
B
telophase
C
anaphase
D
late prophase
E
metaphase
Q9
A pair of genes which controls a trait is described as
A
dominant
B
ressesive
C
allele
D
variant
E
hybrid
Q10
The genetic make-up of an organism is described as its
A
phenotype
B
genotype
C
character
D
chromosome
E
allele
Q11
The precondition for transfusion of blood to an accident victim is
A
seeking the consent of his parents
B
ascertaining the religious belief of the victim
C
cross-matching the blood group of the donor with that of the accident victim
D
curring
E
the donor of any disease traced in his blood
Q12
Which of the following represent the phenotypic ratio, when a plant Rr is crossed with another plant Rr, assuming that the gene R for round seeds is dominant and wrinkled while r is recessive?
A
1:2:1
B
2:2:1
C
3:2
D
3:1
E
4:1
Q13
All hereditary characters in a cell are passed on from parent-cell to daughter-cell through the process of
A
mitosis
B
meiosis
C
fertilisation
D
implantation
E
gestation
Q14
The similarity between the bone structure of the arm of a human and the fore limb of a rabbit indicates?
A
adaptive radiation
B
continuous variation
C
a common origin
D
convergent evolution
E
adaptation to the same environment
Q15
Assuming that 'A' is a gene for normal skin and its dominant , while 'a' is gene for albinism and it is recessive, what is likely genotype of a couple which had 50% normal and 50% albinos?
A
AA Aa
B
AA aa
C
Aa Aa
D
Aa aa
E
AA AA
Q16
Which of the following is not consistuent of DNA?
A
Purine
B
Phosphate
C
Cystocine
D
Deoxyribose
E
Uracil
Q17
Which of the following best describes the homologous chromosomes? They are
A
a product of the division of a chromosome
B
two identical chromosome from each parent
C
chromosome arranged on spindle fibre during cell division
D
daughter chromatides formed during meiotic division
E
chromosomes during telophase of mitotic division
Q18
The haploid number of chromosomes in a man is
A
48
B
46
C
42
D
24
E
23
Q19
If a cross is made between a pure-breeding red flowered plant and a pure-breeding white flowered plant where R is dominant for red flower and r is recessive for white, the more likely result of F generation will be
A
75% red flowers and 25% white flowers
B
all red flowers
C
75% white flowers and 25% red flowers
D
50% red flowers and 50% white flowers
E
all white flowers
Q20
A man with blood group A (TAP) married a woman with blood group O (pp). Which of the following is the probable ratio of the blood groups of the offspring?
A
1:1
B
3:1
C
2:1:1
D
1:2:1
E
4:1
Q21
Which of the following is not true about gene mutation?
A
introduces new traits into the population
B
causes changes in the DNA
C
may have unnoticeable effects on the phenotype
D
always affects the chromosome number
E
is a source of new genes