Question

Deletion of a DNA base from a gene affects an organism by—

Answer 1

Answer:

Deletion of a DNA base from a gene affects an organism by changing the sequence of amino acids in a protein.

Explanation:

A DNA fragment forms a gene, with a specific sequence of nitrogenous bases, which determines the synthesis of a specific protein. When a deletion of a base occurs in such a gene, it affects:

• Transcription of the mRNA, which will have the sequence of altered bases.
• During translation, the mRNA codons will encode at least one different amino acid.
• The structure of the synthesized protein, which will be altered by changes in its amino acid sequence.

In summary, the deletion of a base in the DNA will affect the protein to be synthesized by changing the amino acid sequence of its structure.

The other options are not possible, because the deletion of a base in the DNA of a gene

    Does not influence the number of chromosomes that the gametes will have.

    It does not produce long chains in the chromosomes.

    It does not affect the ribose structure of the nucleic acids.