Q4.8. 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 hom length.
It is impossible to say, because dominance cannot be inferred from fitness.