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The reason why the allele frequency that causes sickle cell anemia is at a high frequency is due to an antagonistic pleiotropy Heterozygous for the sickle cell anemia makes an individual resistant to malaria and there is also no outcome of any symptoms The high frequency is not continuous throughout a population it would be a lot more common in areas where there's a much higher risk for an individual to be affected by malaria An increased resistance to malaria in an area like these would be heterozygous advantage Certain populations will have big populations of heterozygous individuals despite the fact that being homozygous for sickle cell anemia has the consequence of being lower fitness Natural selection is the process in which those with advantageous traits will not only survive the longest but also leave the most offspring Organisms that have heritable features that help them survive and reproduce leave more offspring This means that over generations these heritable features will be very common in the population Phenotype essentially is a product of genotype Natural selection responds to an organism phenotype Microevolution can be caused when a phenotype helps with an organism survival and reproduction natural selection has the potential to increase the frequency from one generation to the next
The outcome of Battles of Saratoga caused France to recognize America as a real country and eventually caused France to ally with the Americans and declare war on Britain The Franco American alliance that came out of this American victory caused the Americans to receive many troops supplies clothing food and weapons that were crucial to winning the Revolutionary War On its own America had ample men to bear arms but lacked the arms ammunition and money to defeat Britain Unger 17 Because of the victory of the Americans in the Battles of Saratoga and the Americans alliance with France France sent over twelve thousand soldiers to fight with the Continental Army Just one ship the Mercury that was sent to America from France carrying supplies contained more than twelve thousand muskets fifty tons of powder and large quantities of cloth caps shoes stockings and blankets American Revolution FAQs Alden 120 during the Revolutionary War
