sympatric speciation

• what is meant by sympatric speciation


  this is specification that occurs without geographical isolation
• what type of behaviour causes behavioural isolation


  courtship behaviour
• What is courtship behaviour?

  Behaviour carried out by organisms to attract a mate
• what is meant by behavioral isolation

  this is when animals cannot reproduce due to a failed attempts at mating displays
• what is morphological isolation

  this is when two animals are not compatible enough to mate
• give an example of morphological isolation

  insects will have rigid exoskeletons which mean that their genitals must be compatible
• what is meant by gametic isolation

  this is when gametes are not comaptible
• what will cause gametic isolation

  these are the barriers preventing gametes of different species fusing
• give an example of gametic isolation

  spermatozoa can only survive in an oviduct of the same species
• what are the six causes for sympatric speciation

  behavioural isolation , morphological isolation , gametic isolation, seasonal nationalist , hybrid inviability and hybrid sterility
• what is meant by seasonal isolation

  this is when different mating seasons or flowering times prevent populations from breeding
• what is meant by hybrid in-viability

  this is when fertilization occurs between incompatible genes
• what is a hybrid embryo

  this is a a embryo of a organism that is a combination of two incompatible organisms that will be infertile
• what usually happens to a hybrid embryo

  it will either die in its early stages of life , or be unable to produce offspring
• what is meant by hybrid sterility

  this is when a hybrid embryo of two different species survives
• what will hybrid sterility mean about the hybrid produced

  it will be unable to produce gametes that are not sterile
• why will hybrids be sterile

  they wont be able to form bivalents or homologous pairs during prophase. meiosis cant take place , there are no gametes