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Chapter 19: Problem 20

Are mutations random events? Explain your answer.

Short Answer

Expert verified
Yes, mutations are generally considered random events because they occur without a specific purpose or design to meet the adaptive needs of an organism. However, the rate at which mutations occur can be influenced by various factors such as environmental factors and exposure to certain chemicals.

Step by step solution

01

Understanding the concept of a mutation

A mutation is a change in the DNA sequence within a gene or a chromosome of an organism that may result in the creation of a new character or trait not found in the parental type. They are the main source of genetic variation.
02

Are mutations random?

Mutations are said to be random, this means they occur without a specific purpose. They are not designed to meet the adaptive needs of an organism. Mutations are caused by a variety of factors such as errors in DNA replication, exposure to ultraviolet light, certain chemicals, and some viruses.
03

Explaining the randomness of mutations

Mutations are random in the sense that the type of mutation that occurs is not usually influenced by how useful it may be. However, this doesn't mean all mutations occur purely by chance. There are certain factors, such as environmental factors and exposure to certain chemicals, that can influence the rate at which mutations occur.
04

Conclusion

In conclusion, while mutations are random as to the type and usefulness, they do not occur purely by chance without influence. Certain factors can increase the rate of mutation, but the result, whether it is beneficial or detrimental, or has no effect, is not predetermined.

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