period 2, desiree mariscal

period 2, desiree mariscal

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  • Principle #1: Genetic Variation The population of ladybugs consists of two colors: orange with black dots and red with black dots. Not all of the offspring will inherit the trait that allows them to be orange, but those who do have a distasteful fluid that many birds and other insects don't like.
  • Principle #2: Overproduction & Struggle for Survival Between spring and the beginning of summer, a single ladybug can lay up to 1,000 eggs. However, not all of the offspring will be able to survive because they are a food source for many of the other insects and birds. 
  • Principle #3:Differential Survival and Reproduction Predators such as birds and insects prey mostly on the ladybugs with the red color instead of the orange because they taste better due to the fact that they don't have the distasteful fluid. 
  • Principle #4:Change in the Gene Pool As the predators of the environment continue to eat the red ladybugs, the number of the red ones will begin to decrease. On the other hand, the orange ladybugs will increase causing most of the ladybug population to have a distasteful fluid. This does not mean that the red ones will go extinct. 
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