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iogann1982 [59]
3 years ago
9

What type of mutation can alter DNA by the addition of a nucleotide base?

Biology
1 answer:
timama [110]3 years ago
8 0

Answer: insertion

Crossing over is when homologous* chromosomes exchange genes, resulting in gene combinations.

Deletion is when a base pair is deleted from DNA. Insertion is when a base pair is added to DNA. Both insertion and deletion are serious because every amino acid beginning at the mutation will most likely be incorrect. This will lead to a nonfunctional protein.

Base-pair substitution is a substitution of one base pair for another in DNA. The effects of this may be a silent** point, missense*** point, or nonsense**** point.

-------

<em>*A pair of matching chromosomes. They have the same genes but can have different versions.</em>

<em>**A special case where no amino acids are affected.</em>

<em>***Affects one animo acid. The whole protein structure and function may or may not be disrupted. </em>

<em>****Results in a stop codon that shortens the protein.</em>

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Brainly, 200 points I will give you the question to get the other 100 points
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1) ctg act gct aat (you are correct)

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* remember for mRNA, a pairs with u

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to GAC GGA CGA TTA

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Hope that helped! And your teacher did a really bad job forming this question, like how there is no starting codon and (no clarity) you don’t know which DNA sequences to use.
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