Evoloution and gene pools Flashcards
What is evoloution?
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 of the
populations’ DNA.
What is the meaning of allele frequencies?
Allele frequency refers to the relative number of each allele present within a population.
Why an individual organism cannot evolve?
Evolution involves changes to the DNA of a living organism. Changes to DNA
occur through reproduction, therefore evolution can only occur in new
offspring through the process of reproduction.Evolution is also done on a major scale with a population as a whole
What is the definition of population in biology?
Within biology, a population is a group of the same species who live in the
same area and breed with each other.
What is a gene?
A gene is a section of DNA that codes for a trait: such as eye colour
What is an allele?
An allele is an alternative form of a gene: such as blue eyes, brown eyes, green eyes…
What does locus mean?
A locus( plural: loci) refers to the location on the chromosome where the gene is found
What is a gene pool?
A gene pool is the collection of different genes available in an interbreeding
population and describes the number and nature of all the alleles.
What is interbreeding?
the act of mixing different species or varieties of animals or plants and thus to produce hybrids.
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What is the link between gene pools, allele frequencies and evoloution?
Evolution is the process that allows changes and developments to occur
within a population over time, due to reproduction between members of the population. Each population has a gene pool that is a collection of genes
available when breeding between members in the population occurs. The frequency of certain alleles within the gene pool of a population will determine how often certain genes are present in members of the population.
