HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Study the DNA sequences before and after exposure to radiation. Use the evidence to identify the type of mutation that has occured.Before Exposure:ATCGTCA
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No mutation has occurred to the DNA sequence.
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A nitrogen base has been deleted from the DNA molecule.
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A nitrogen base has replaced another nitrogen base in the DNA molecule.
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A nitrogen base has been added to the DNA molecule.
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Explanation:
Detailed explanation-1: -Identification of causal mutations typically begins with genetic mapping, followed by candidate gene sequencing and complementation studies using transformation.
Detailed explanation-2: -The four bases-ATCG. Adenine, thymine, cytosine and guanine are the four nucleotides found in DNA.
Detailed explanation-3: -As the name implies, an insertion occurs when a single nitrogen base is accidentally added in the middle of a sequence. This throws off the reading frame of the DNA and the wrong amino acid is translated.
Detailed explanation-4: -Mutations can be of many types, such as substitution, deletion, insertion, and translocation.
There is 1 question to complete.