EASY
UPSC CAPF AC Paper - I
IMPORTANT
Earn 100

Assertion (A) Human beings have 23 pair of chromosomes, one of which is the sex chromosomes and the remaining are 22 autosomes. The X-linked disease are related to mutation on a sex chromosomes.
Reason (R) Colourblindness results from a mutation in X-chromosome.

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Important Questions on Biology

EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Biology>Exercise 2>Q 67
Genes located on mitochondrial DNA  
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Biology>Exercise 2>Q 68
Sexual reproduction causes genetic variation because of:
HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Biology>Exercise 2>Q 69

Consider the following statements:
1. The sickle cell anaemia is a genetic disease common in tropical and subtropical countries.
2. The sickle cell anaemia is due to mutation in the B-globin gene.
3. Due to sickle-shaped anaemia, the oxygen-carrying capacity of the haemoglobin decreases.
Which of the statements given above is/are correct?

EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Biology>Exercise 2>Q 70
Number of chromosome in a normal human body cell is
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Biology>Exercise 2>Q 71
Consider the following statements
1. Characters are transferred from parents to progeny through DNA.
2. Coded information in nucleic acid depend upon arrangement of nucleotides.
Which of the statement(s) given above is/are correct?
HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Biology>Exercise 2>Q 72
Which one among the following is not correct about Down's syndrome?
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Biology>Exercise 2>Q 74

Assertion (A): In human being, the female play a major role in determining the sex of the offspring. 

Reason (R): Women have two ‘X’-chromosomes.

MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 11 - Science & Technology>Exercise 1>Q 37

At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us?

1. It is possible to know the pedigree of live stock.
2. It is possible to understand the causes of all human diseases.
3. It is possible to develop disease-resistant animal breeds.

Which of the statements above given is/are correct?