A lizard population has two alleles for horn length. Long horns help protect the

Question

A lizard population has two alleles for horn length. Long horns help protect the lizard from predation by birds. Homozygotes with allele 1 have long horns, while homozygotes with allele 2 have short horns. Given this information, which of the following is most likely true about the mode of inheritance for allele 1, and why?

Allele 1 is dominant, because it gives lizards an advantage.

Allele 1 is recessive, because it gives lizards an advantage.

Alleles 1 and 2 are codominant, because each codes for a different horn length.

It is impossible to say, because dominance cannot be inferred from fitness.

Explanation / Answer

It is impossible to say, because dominance cannot be inferred from fitness ...

A gene that can have a selective advantage cannot be necessarily dominant ....

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