Question

The diagrams below show gene duplication in two lineages. Species 1 Species 2 Species 1 Species 2 1A 1B 2A 2B 1A 1B 2A 2B -Duplication 2 Speciation Duplication Speciation A. In diagram 1, a paralog to 1A is An ortholog to 1A is B. In diagram 2, a paralog to 1A is An ortholog to 1A is

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A) Paralog to 1A is 1B and ortholog to 1A is 2A

B) Paralog to 1A is 1B and ortholog to 1A is 2A

Explanation for A and B

Homologs- a gene is related to another gene through an ancestral DNA seguence.

Eg-1A, 2A, 1B, 2B

Paralog - here genes are related after a duplication within the genome and the function of Paralog genes may varies in each species.

Ortholog - ortholog genes are evolved after speciation(evolution of new species) . The function of the protein produced from ortholog are similar within the species.

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