Q. How many pairs of chromosomes do most domestic animals have?
Solution
Most domestic animals, including humans, have 23 pairs of chromosomes, totaling 46 chromosomes.
Correct Answer:
B
— 23
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Q. What is a common consequence of chromosomal abnormalities in animals?
-
A.
Increased lifespan
-
B.
Enhanced fertility
-
C.
Genetic disorders
-
D.
Improved immunity
Solution
Chromosomal abnormalities can lead to genetic disorders, affecting the health and development of the affected animals.
Correct Answer:
C
— Genetic disorders
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Q. What is the main component of chromosomes?
-
A.
RNA
-
B.
Proteins
-
C.
Lipids
-
D.
DNA
Solution
DNA is the main component of chromosomes, carrying the genetic instructions for the development and functioning of living organisms.
Correct Answer:
D
— DNA
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Q. What is the primary function of chromosomes in animal cells?
-
A.
Energy production
-
B.
Protein synthesis
-
C.
Genetic information storage
-
D.
Cellular respiration
Solution
Chromosomes are structures that carry genetic information in the form of DNA, which is essential for inheritance and cellular function.
Correct Answer:
C
— Genetic information storage
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Q. What is the role of telomeres in chromosomes?
-
A.
DNA replication
-
B.
Gene expression
-
C.
Protecting chromosome ends
-
D.
Protein synthesis
Solution
Telomeres are repetitive nucleotide sequences at the ends of chromosomes that protect them from degradation and fusion.
Correct Answer:
C
— Protecting chromosome ends
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Q. What is the significance of chromosome mapping in animal biotechnology?
-
A.
Identifying genetic disorders
-
B.
Improving animal nutrition
-
C.
Enhancing growth rates
-
D.
Increasing disease resistance
Solution
Chromosome mapping helps identify the location of genes associated with genetic disorders, aiding in breeding and treatment strategies.
Correct Answer:
A
— Identifying genetic disorders
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Q. What is the term for the process of creating genetically modified animals?
-
A.
Cloning
-
B.
Transgenesis
-
C.
Selective breeding
-
D.
Hybridization
Solution
Transgenesis is the process of introducing foreign DNA into an animal's genome to create genetically modified organisms.
Correct Answer:
B
— Transgenesis
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Q. Which animal is commonly used as a model organism in genetic studies?
-
A.
Dog
-
B.
Mouse
-
C.
Cat
-
D.
Horse
Solution
The mouse is widely used as a model organism in genetic studies due to its genetic similarity to humans and short reproductive cycle.
Correct Answer:
B
— Mouse
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Q. Which of the following techniques is commonly used to analyze chromosomes?
-
A.
PCR
-
B.
Karyotyping
-
C.
Gel electrophoresis
-
D.
Western blotting
Solution
Karyotyping is a laboratory technique used to visualize and analyze the number and structure of chromosomes.
Correct Answer:
B
— Karyotyping
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Q. Which process results in the formation of gametes with half the number of chromosomes?
-
A.
Mitosis
-
B.
Meiosis
-
C.
Fertilization
-
D.
Binary fission
Solution
Meiosis is the process that reduces the chromosome number by half, producing gametes for sexual reproduction.
Correct Answer:
B
— Meiosis
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