HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They result in new genetic sequences.
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They are caused only by the events of mitosis.
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They occur to meet the needs of a species.
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They do not occur at random.
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Detailed explanation-1: -An insertion changes the DNA sequence by adding one or more nucleotides to the gene. As a result, the protein made from the gene may not function properly. A deletion changes the DNA sequence by removing at least one nucleotide in a gene.
Detailed explanation-2: -Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection. Germline mutations (that occur in eggs and sperm) can be passed on to offspring, while somatic mutations (that occur in body cells) are not passed on.
Detailed explanation-3: -Mutations can be of many types, such as substitution, deletion, insertion, and translocation.
Detailed explanation-4: -Point mutations are the most common type of mutation and there are two types.