natural selection Flashcards
the process of natural selection,( include the roles of variation, selection pressure, and advantageous alleles)
Natural selection is populations of living things to change over time.
If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation
how does natural selection lead to changes in allele frequencies within a population
every individual of the population will carry the allele, while detrimental mutations may be swiftly eliminated from the gene pool
how natural selection might influence the following populations:
Peppered moth during the industrial revolution
Insecticide resistance in insects
Bacterial resistence for antibotics
peppered moths: industrialization and domestic coal fires had caused air pollution, which had killed off lichens and blackened urban tree trunks and walls. So, it was now the pale form of the moth that was more obvious to predators, while the melanic form was better camouflaged and more likely to survive and produce offspring.
Bacteria can become resistant to antibiotics through mutations that alter the cellular targets of antibiotics
explain the role of artificial selection in modyfying phenotypes in plants and animals.
Provide examples such as colour budgerigars and variation in dogs.
Artificial selection is an evolutionary process in which humans consciously select for or against particular features in organisms
the use of artificial selection has allowed humans to drastically alter the appearance of dogs.
