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sergey [27]
3 years ago
12

A mutagen is

Biology
2 answers:
jarptica [38.1K]3 years ago
8 0

Answer:

the answer is B on edg 2020

Explanation:

Novay_Z [31]3 years ago
4 0

Answer: The correct answer is-

an agent that causes a mutation in DNA.

Mutagen is an agent or a substance that causes permanent change in the genetic material of living organisms ( DNA, deoxyribonucleic acid). This process is called mutation.

A mutagen can be a chemical, physical or biological agent that causes mutation in the DNA.

Example- Physical agents such as -

  • Ionizing radiations like alpha particles, gamma rays,  X-rays that brings break in the DNA and cause other damages.
  • Ultraviolet radiations that creates pyrimidine dimers ( T=T) and causes replication errors if damage is not repaired.
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Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.

Explanation:

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