Genetics & Evolution UPSC Questions

Biology

Genetics & Evolution MCQ Questions


1.
Who proposed the double-helical structure of DNA?
A.
James Watson and Francis Crick
B.
Gregor Mendel
C.
Rosalind Franklin
D.
Kornbergs
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ANSWER :
A. James Watson and Francis Crick
2.
The word ‘Denisovan’ is sometimes mentioned in media in reference to
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A.
fossils of a kind of dinosaurs
B.
an early human species
C.
a cave system found in North-East India
D.
a geological period in the history of Indian subcontinent.
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ANSWER :
B. an early human species
3.
What does the term 'inheritance' refer to in genetics?
A.
Random mutations in DNA
B.
Passing of traits from parents to offspring
C.
Evolution of species
D.
Formation of gametes
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ANSWER :
B. Passing of traits from parents to offspring
4.
What is a 'true-breeding' line?
A.
A line showing variation in traits
B.
A hybrid line
C.
A line with unstable traits
D.
A line showing stable trait inheritance over generations
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ANSWER :
D. A line showing stable trait inheritance over generations
5.
Which organism did Mendel use for his hybridization experiments?
A.
Maize
B.
Garden pea
C.
Tomato
D.
Sunflower
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ANSWER :
B. Garden pea
6.
In the context of hereditary diseases, consider the following statements:
1. Passing on mitochondrial diseases from parent to child can be prevented by mitochondrial replacement therapy either before or after in vitro fertilization of the egg.
2. A child inherits mitochondrial diseases entirely from the mother and not from the father.
Which of the statements given above is/are correct?
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A.
1 only
B.
2 only
C.
Both 1 and 2
D.
Neither 1 nor 2
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ANSWER :
C. Both 1 and 2