(b) The volcanic rock caused the same mutation in each rock pocket mouse population, resulting in dark coloration. (a) The mice in the two populations evolved from the same ancestral population. Which of the following could explain this observation?
#Rock pocket mouse allele and phenotype answer key Patch#
The sequence you get is identical to that of the same gene in another rock pocket mouse population with dark-colored fur that live on a different patch of volcanic rock. You take a DNA sample from a member of this new population and determine the DNA sequence of a gene known to play a role in fur color.
You are studying a recently discovered population of rock pocket mice with dark-colored fur that lives on volcanic rock. Natural selection is not random, as it is an external force that eliminates organisms based on those mutations.ģ. Mutations are random because any can occur at any time and like they said in the video, they can be positive, negative or neutral. Sean Carroll states that, “While mutation is random, natural selection is not.” In your own words, explain how this is possible.
Is the following statement true or false? Justify your answer in one or two sentences: “The appearance of dark-colored volcanic rock caused the mutation for black fur to appear in the rock pocket mouse population.”įalse. The mutation of black fur was always there, the appearance of the volcanic rock simply made it so that natural selection eliminated more of the mice who did not have the same color fur as the rock.Ģ.
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