NEET BIOLOGY

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GENETICS AND EVOLUTION

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which process contributes to a change in characteristics during a person’s lifetimeI. Genes can be switched on or offII. Multiple genes determine characteristicsIII. Gene expression can be affected by environmental factors
A
I and II only
B
I and III only
C
II and III only
D
I, II and II
Explanation: 

Detailed explanation-1: -Epigenetics allows the muscle cell to turn “on” genes to make proteins important for its job and turn “off” genes important for a nerve cell’s job. Your epigenetics change throughout your life.

Detailed explanation-2: -The process of turning genes on and off is known as gene regulation. Gene regulation is an important part of normal development.

Detailed explanation-3: -Environmental factors, such as nutrition, stress, and teratogens are thought to change gene expression by switching genes on and off. These gene changes can then be inherited by daughter cells.

Detailed explanation-4: -Genome editing (also called gene editing) is a group of technologies that give scientists the ability to change an organism’s DNA. These technologies allow genetic material to be added, removed, or altered at particular locations in the genome.

Detailed explanation-5: -Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes.

There is 1 question to complete.
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