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Variation and Selection | IGCSE , O Level Biology pptx
This comprehensive presentation on Variation & Natural Selection explores the genetic and environmental sources of differences among individuals within a species. It delves into continuous versus discontinuous variation, illustrating how traits like height produce bell curves, while characteristics such as blood type result in step-like distributions. The presentation explains how mutations, along with random mating and segregation during meiosis, generate genetic diversity. It then connects these variations to natural selection—the process of “survival of the fittest“—where individuals with advantageous traits are more likely to reproduce. Finally, it covers artificial selection through selective breeding in both crops and animals.
#Variation, #NaturalSelection, #Adaptation, #GeneticDiversity, #Mutation, and #SelectiveBreeding.
#Variation, #NaturalSelection, #Adaptation, #GeneticDiversity, #Mutation, and #SelectiveBreeding.