You Learned How Freshwater Stickleback Populations Have Lost Their Body

question 37

Essay

You learned how freshwater stickleback populations have lost their body armor through positive selection of a low-armor Eda allele, which is found at low frequency in marine populations. How could you determine whether the low-armor phenotype arose once and spread throughout freshwater populations, or whether the allele was selected for independently multiple times?

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Definitions:

CABs

Acronym for cardiopulmonary resuscitation, airway, and breathing; key steps in emergency response to support vital functions.

ingested Poison

A substance that is harmful or lethal when consumed and can cause poisoning.

Abdominal Pain

Discomfort or pain located anywhere within the abdomen.

Hematoma

A swelling caused by blood under the skin.