Year :
2010
Title :
Biology
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
51 - 60 of 60 Questions
| # | Question | Ans |
|---|---|---|
| 51. |
In artificial selection, individuals without desirable traits may be prevented from mating by A. outbreeding B. sterilization C. inbreeding D. genetic engineering |
B |
| 52. |
In a family of eight (8) all the children are girls Which of the following reasons correctly explains this? A. The woman cannot produce male children B. The man has a low sperm count C. The Y component of the man’s sex chromosome was always involved D. The X component of the man’s sex chromosome was always involved. |
D |
| 53. |
Which of the following statements is correct about the structure of a chromosome? A chromosome consists of A. two chromatids joined at the centromere B. Two chromatids joined at the spindle C. Two chromatin threads joined at the centrioles D. thread-like structures not joined together |
A |
| 54. |
Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are A. IA IO and IB IB B. IA IA and IB IB C. IA IB and IA IO D. IA IO and IB IO. |
D |
| 55. |
What would be the phenotypic ratio of the offspring of a cross between a heterozygous dominant parent and a double recessive parent? A. 1 : 2: 1 B. 1 : 1 C. 3 :1 D. 2 : 1 |
B |
| 56. |
The percentage probability that a normal male married to a carrier woman would have a haemophilic male child is A. 35%. B. 50% C. 75% D. 100%. |
B |
| 57. |
The importance of courtship in animals includes the following except A. ensuring that the female chooses the right male species B. arousing both male and female partners C. protection of territory D. to coincide with the ovulation period and ensure fertilization |
D |
| 58. |
In evolution, analogous structures are significant because they show A. physiological diversity B. functional diversity C. genetic diversity D. structural diversity Detailed SolutionAnalogous structures are defined as biological structures having similar or corresponding functions but not from the same evolutionary origin. |
|
| 59. |
Which of the following statements reflects the mechanism of natural selection? A. There are variations within every species B. Individuals of every species are genetically identical C. No organism in a species dies before sexual maturity D. Organisms with selective advantages are less likely to survive |
A |
| 60. |
Which of the following animals exhibits territoriality? A. Rabbit B. Earthworm C. Lizard D. Toad |
C |
| 51. |
In artificial selection, individuals without desirable traits may be prevented from mating by A. outbreeding B. sterilization C. inbreeding D. genetic engineering |
B |
| 52. |
In a family of eight (8) all the children are girls Which of the following reasons correctly explains this? A. The woman cannot produce male children B. The man has a low sperm count C. The Y component of the man’s sex chromosome was always involved D. The X component of the man’s sex chromosome was always involved. |
D |
| 53. |
Which of the following statements is correct about the structure of a chromosome? A chromosome consists of A. two chromatids joined at the centromere B. Two chromatids joined at the spindle C. Two chromatin threads joined at the centrioles D. thread-like structures not joined together |
A |
| 54. |
Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are A. IA IO and IB IB B. IA IA and IB IB C. IA IB and IA IO D. IA IO and IB IO. |
D |
| 55. |
What would be the phenotypic ratio of the offspring of a cross between a heterozygous dominant parent and a double recessive parent? A. 1 : 2: 1 B. 1 : 1 C. 3 :1 D. 2 : 1 |
B |
| 56. |
The percentage probability that a normal male married to a carrier woman would have a haemophilic male child is A. 35%. B. 50% C. 75% D. 100%. |
B |
| 57. |
The importance of courtship in animals includes the following except A. ensuring that the female chooses the right male species B. arousing both male and female partners C. protection of territory D. to coincide with the ovulation period and ensure fertilization |
D |
| 58. |
In evolution, analogous structures are significant because they show A. physiological diversity B. functional diversity C. genetic diversity D. structural diversity Detailed SolutionAnalogous structures are defined as biological structures having similar or corresponding functions but not from the same evolutionary origin. |
|
| 59. |
Which of the following statements reflects the mechanism of natural selection? A. There are variations within every species B. Individuals of every species are genetically identical C. No organism in a species dies before sexual maturity D. Organisms with selective advantages are less likely to survive |
A |
| 60. |
Which of the following animals exhibits territoriality? A. Rabbit B. Earthworm C. Lizard D. Toad |
C |