HEREDITY
MUTATIONS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
When one nitrogen base is removed from a DNA strand, what type of mutation has occurred?
|
|
Deletion mutation.
|
|
|
Addition mutation.
|
|
|
Chromosomal mutation.
|
|
|
Point mutation.
|
Explanation:
Detailed explanation-1: -Figure 6: Deamination is a spontaneous mutation that occurs when an amine group is removed from a nitrogenous base.
Detailed explanation-2: -Deletions A deletion, resulting in a frameshift, results when one or more base pairs are lost from the DNA (see Figure above).
Detailed explanation-3: -A deletion changes the DNA sequence by removing at least one nucleotide in a gene.
Detailed explanation-4: -A substitution is a mutation that exchanges one base for another (i.e., a change in a single “chemical letter” such as switching an A to a G). Such a substitution could: change a codon to one that encodes a different amino acid and cause a small change in the protein produced.
There is 1 question to complete.