Respuesta :
A homologous gene is a gene inherited from or descended from a common ancestor. So the correct option is A.
What is meant by homology?
A homologous gene or a homolog is a gene which is inherited in two different species which have a common ancestor. Homologous genes are similar in their sequence but not all genes which are similar in sequences are homologous.
The homologous genes are orthologous where the gene has diverged after an event of speciation. Here, genes along with their main function are conserved.
In a species, if a gene is duplicated, it results in the genes which are paralogs of each other. They even might become different in sequence composition and function over time.
Therefore, the correct option is A.
Read more about homologous genes, here
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