Gene families are groups of paralogous genes ( e.g. hemoglobins, olfactory recep

Question

Gene families are groups of paralogous genes ( e.g. hemoglobins, olfactory receptors and opsin photoreceptors). How are these paralogous genes related?

A. They are the same DNA sequence present in the genomes of different species and retain the same function in each species

B. Different genes entered the genome by cells picking up other organism’s DNA and so have a different sequence and function

C. They were produced by inversions and so they are express complementary RNA and induce antisense silencing of genes

D. They were produced by duplication but have mutated so much that their DNA sequence and functions are totally different and not related

E. They were produced by duplication and so share similar DNA sequence and function

A. They are the same DNA sequence present in the genomes of different species and retain the same function in each species

B. Different genes entered the genome by cells picking up other organism’s DNA and so have a different sequence and function

C. They were produced by inversions and so they are express complementary RNA and induce antisense silencing of genes

D. They were produced by duplication but have mutated so much that their DNA sequence and functions are totally different and not related

E. They were produced by duplication and so share similar DNA sequence and function

Explanation / Answer

Paralogous genes are related by duplication within genome. They are homologous genes that occur within one species and have diverged after duplication event.

So option D is correct

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