EVOLUTION + GENE POOL Flashcards
what is the definition of evolution?
evolution is the development of populations over generations, due to changes in their DNA. It occurs through reproduction within populations and results in large-scale gradual and cumulative changes in the allele frequencies in the populations’ DNA.
why an individual organism can’t evolve?
because evolution happens at the population level over generations, relying on genetic variation and natural selection which affects populations, not single individuals.
what is the definition of a population in biology?
population is a group of the same species who live in the same area and breed with eachother.
what is the difference between a gene and an allele?
a gene is a section of DNA that codes for a particular trait, such as eye colour. An allele is an expression of a gene, describing the appearance of the trait, such as having blue or green eyes.
what is the definition of a gene pool?
a collection of different genes available in an interbreeding population and describes the number and nature of all the alleles.
what is the link between gene pools, or allele frequencies, and evolution?
is that changes in allele frequencies in a gene pool lead to evolution, when certain alleles become more common, they affect the traits in the population, causing it to evolve over time.
