A shark pup has a pointed fin. Its mother also had a pointed fin, but its father had a rounded fin. Which of these statements explains why the shark pup has a pointed fin?

a
The shark pup inherited one copy of the gene for fin shape from its mother and one copy from its father. That gene combination instructs for proteins that connect in ways that make its fin pointed.
The shark pup inherited one copy of the gene for fin shape from its mother and one copy from its father. That gene combination instructs for proteins that connect in ways that make its fin pointed.

b
The shark pup inherited one copy of the gene for fin shape from its mother and one copy from its father. Those genes connect together to make its fin pointed.
The shark pup inherited one copy of the gene for fin shape from its mother and one copy from its father. Those genes connect together to make its fin pointed.

c
The shark pup inherited its copies of the gene for fin shape from its mother and not from its father. Those genes connect together to make its fin pointed.
The shark pup inherited its copies of the gene for fin shape from its mother and not from its father. Those genes connect together to make its fin pointed.

d
The shark pup inherited its copies of the gene for fin shape from its mother and not from its father. Just like its mother’s genes, those genes instruct for proteins that connect in ways that make its fin pointed.

The shark pup inherited one copy of the gene for fin shape from its mother and one copy from its father. That gene combination instructs for proteins that connect in ways that make its fin pointed.

Explanation:

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