The phylogenetic tree shows the evolutionary relatedness of several fish species - Scottish Highers Biology - Question 4 - 2023
Question 4
The phylogenetic tree shows the evolutionary relatedness of several fish species.
(a) (i) State how many millions of years ago the last common ancestor of Nile tila... show full transcript
Worked Solution & Example Answer:The phylogenetic tree shows the evolutionary relatedness of several fish species - Scottish Highers Biology - Question 4 - 2023
Step 1
State how many millions of years ago the last common ancestor of Nile tilapia and medaka existed.
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Answer
The last common ancestor of Nile tilapia and medaka existed approximately 88 million years ago.
Step 2
State how many species evolved from a common ancestor 100 million years ago.
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Answer
From a common ancestor 100 million years ago, 6 species evolved.
Step 3
Name the species that is most distantly related to the mudskipper.
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Answer
The species that is most distantly related to the mudskipper is the zebrafish.
Step 4
Use the information given to identify the gene responsible for the development of the pelvic fin.
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Answer
The gene responsible for the development of the pelvic fin is gene C.
Step 5
Name the type of mutation that resulted in the gene sequence found in the Atlantic cod.
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Answer
The type of mutation that resulted in the gene sequence found in the Atlantic cod is an inversion.
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