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Q70·GS Paper 1 · Prelims 2023

Microsatellite DNA — used in which case

S&TBiotechnology & GeneticsFactual singleHardStatic

Question

'Microsatellite DNA' is used in the case of which one of the following?

Options

a

Studying the evolutionary relationships among various species of fauna

Answer
b

Stimulating 'stem cells' to transform into diverse functional tissues

c

Promoting clonal propagation of horticultural plants

d

Assessing the efficacy of drugs by conducting series of drug trials in a population

Explanation

Microsatellite DNA consists of short, highly variable repeating sequences in the genome. Because these sequences mutate rapidly and differ greatly between individuals and populations, they are the standard genetic markers used for DNA profiling, paternity testing, and mapping the evolutionary relationships and genetic diversity among species.

High mutation rates in non-coding DNA (like microsatellites) create the unique genetic "fingerprints" necessary for evolutionary tracking.

Answer: (a).

Question details

Year

2023

Paper

GS Paper 1

Question

Q70

Subject

Science & Technology

Sub-topic

Biotechnology & Genetics

Type

Factual single

Difficulty

Hard

Nature

Static

Source hint

NCERT Biology Cl.12 Ch.6

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