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Minor changes at gene level are described as
[1997]
- a)Point mutations
- b)Chromosomal mutations
- c)Reverse mutations
- d)Forward mutations
Correct answer is option 'A'. Can you explain this answer?
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Minor changes at gene level are described as[1997]a)Point mutationsb)C...
Gene mutation or point mutation is the change in expression of a gene caused by change in number sequence and types of nucleotides. A mutation from a wild gene type to a new type is called forward mutation. Reversal of mutated gene to wild type is reverse mutation. Chromosomal mutations are changes in the morphology of chromosomes.
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Minor changes at gene level are described as[1997]a)Point mutationsb)C...
Point mutations:
Minor changes at the gene level are described as point mutations.
Explanation:
Point mutations involve changes in a single nucleotide base within the DNA sequence. This can result in the substitution of one nucleotide for another, the insertion of an extra nucleotide, or the deletion of a nucleotide.
Types of Point Mutations:
- Substitution: In substitution mutations, one nucleotide is replaced by another. This can lead to an alteration in the amino acid sequence during protein synthesis.
- Insertion: Insertion mutations involve the addition of extra nucleotides into the DNA sequence. This can disrupt the reading frame and alter the protein product.
- Deletion: Deletion mutations result in the loss of nucleotides from the DNA sequence. Like insertion mutations, deletions can also cause a shift in the reading frame and affect protein synthesis.
Effects of Point Mutations:
Point mutations can have varying effects on the resulting protein. Some mutations may be silent, meaning they do not change the amino acid sequence. Others can lead to non-functional proteins or proteins with altered functions, depending on the specific nucleotide change.
In conclusion, point mutations are minor changes at the gene level that can have significant impacts on protein structure and function.
Minor changes at the gene level are described as point mutations.
Explanation:
Point mutations involve changes in a single nucleotide base within the DNA sequence. This can result in the substitution of one nucleotide for another, the insertion of an extra nucleotide, or the deletion of a nucleotide.
Types of Point Mutations:
- Substitution: In substitution mutations, one nucleotide is replaced by another. This can lead to an alteration in the amino acid sequence during protein synthesis.
- Insertion: Insertion mutations involve the addition of extra nucleotides into the DNA sequence. This can disrupt the reading frame and alter the protein product.
- Deletion: Deletion mutations result in the loss of nucleotides from the DNA sequence. Like insertion mutations, deletions can also cause a shift in the reading frame and affect protein synthesis.
Effects of Point Mutations:
Point mutations can have varying effects on the resulting protein. Some mutations may be silent, meaning they do not change the amino acid sequence. Others can lead to non-functional proteins or proteins with altered functions, depending on the specific nucleotide change.
In conclusion, point mutations are minor changes at the gene level that can have significant impacts on protein structure and function.
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Minor changes at gene level are described as[1997]a)Point mutationsb)Chromosomal mutationsc)Reverse mutationsd)Forward mutationsCorrect answer is option 'A'. Can you explain this answer?
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