help me on carrier advantage/evolved via sexual selection
Posted 12 December 2012 - 08:47 AM
Given the potential advantage to carriers, discuss how this advantage might have evolved via a sexual selection (SS) mechanism. Be sure to define SS, put it in the context of natural selection (NS), and clearly state what the advantage to carriers is. Remember that evolution by NS takes place in the context of specific environments so be sure to include the role of the environment.
Posted 12 December 2012 - 01:31 PM
Posted 13 December 2012 - 01:30 PM
However as you noted the people with sickle cell have a protective mechanism against malaria that means that they are less likely to get the disease, and hence have a better chance of surviving and/or have a shorter disease course meaning (in the absence of modern technology/shops etc.) that they are more likely to survive to hunt for food again. Note the incomplete recessiveness - partial expression of the recessive gene is enough to confer malaria resistance... there's your mechanism