What does it mean if two species have similiar proteins and genes?
Correct answer: B. They have common ancestors
- A. They have the same organs
- B. They have common ancestors
- C. They have similiar appearance
- D. All of the above options are correct
Explanation
A homologous trait is often called a homolog. In genetics, the term "homolog" is used both to refer to a homologous protein and the gene ( DNA sequence) encoding it. Evolutionary descent and gene similarity are relatively connected. If two species have the same DNA sequence in their genes, this indicates that they share a common ancestor. Hence, B is the correct option.
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About Evolution
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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