Question

part 1: the following mutation is found in the somatic cell of an organism
original dna: atg - ccg - tta
mutated: atg - ccg - ttt
what will be the result of this mutation? select all that apply

• this mutation will not be passed on to the offspring
• the mutation will be genotypic and phenotypic
• the mutation is only genotypic
• the mutation is only phenotypic
• this mutation will be passed on to the offspring

Explanation:

Step1: Analyze Somatic Cell Mutation

Somatic cells are body cells, not germ cells. Mutations in somatic cells are not passed to offspring. So "This mutation will not be passed on to the offspring" is correct, and "This mutation will be passed on to the offspring" is wrong.

Step2: Analyze Genotypic and Phenotypic Impact

A DNA sequence change (like TTA→TTT) is a genotypic change. If this change affects the protein (e.g., amino acid change), it can be phenotypic. So the mutation is genotypic and may be phenotypic, so "The mutation will be genotypic and phenotypic" is correct. "Only genotypic" or "only phenotypic" are wrong as genotypic change can lead to phenotypic change.

Answer:

• This mutation will not be passed on to the offspring
• The mutation will be genotypic and phenotypic