Section4 Sraded Questions Mendelian Figs Q NOTES QUESTIONs Q4.8. A lizard popula

Question

Section4 Sraded Questions Mendelian Figs Q NOTES QUESTIONs Q4.8. A lizard population has two alleles for horn length. Long horns help protect the lizard from predation by birds. Homozygotes with allele I 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? O Allele 1 is dominant, because it gives lizards an advantage. O Allele 1 is recessive, because it gives lizards an advantage. O Alleles 1 and 2 are codominant, because each codes for a different hon length O It is impossible to say, because dominance cannot be inferred from fitness. Q4.9. The allele for black noses in wolves is dominant over the allele for brown noses. There is no known selective advantage for one nose color over another in wolves. If this remains true, which of the following statements is most likely TRUE about the change in wolf nose colors over many generations? O Black noses will become more common than they are now O Black noses will stay about the same frequency as now O Black noses will become less common than they are now O Brown noses will disappear after enough generations pass

Explanation / Answer

Answer 4.8: D It is impossible to say about the dominance or recessiveness of allele 1 because dominance is not inferred from fitness

Answer 4.9 B Black noses will stay about the same frequency as now. because there is no selective advantage for nose color

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