1: What happened with Diane Dodd and the fruit flies? How did she create reproductive isolation? Diane Dodd and her fruit flies was fed different things. She created reproductive isolation is having 2 species that originally bred with each other.
2: What is the definition a species? A definition of species concepts, with links to examples, collections and related resources.
3: What are the two main types of barriers in reproductive isolation?
The 2 main types of barriers in reproductive isolation is geographic and post-zygotic/pre-zygotic.
4: What is gene flow? What is reproductive isolation? Gene flow is the transfer of alleles from one population to another population through immigration of individuals.Reproductive isolation refers to any mechanism that prevents two species from creating offspring together.
5: What is geographic isolation? (Give an example). Being separated from others by water, rift, canyon, or another geological barrier.
EX:The people of Finland, who are secluded to some degree from the rest of the world by water, develop certain diseases due to the lack of genetic material from other ethnicities and races.
6: What is allopatric speciation? (give an example)
Allopatric speciation is just a fancy name for speciation by geographic isolation, discussed earlier.
EX: they become subjected to different selective pressures
7: What is sympatric speciation? (give an example)
Sympatric speciation is the process through which new species evolve from a single ancestral species while inhabiting the same geographic region.
EX:Sympatric and sympatry are terms from biogeography, referring to organisms whose ranges overlap or are even identical, so that they occur together at least in some places.
8: What is peripatric/parapatric speciation? (give an example)
Peripatric speciation is a special version of the allopatric speciation mode and happens when one of the isolated populations has very few individuals.
EX:on an oceanic island compared to the mainland.
9: What are pre-zygotic barriers? Name the types of pre-zygotic barriers (explain each).
(Temporal, Mechanical, Behavioral)
A pre-zygotic barrier is something that prevents fertilization.
Temporal- Putting them in a lab will allow them to interbreed.
Behavior- Living in hybrid zones
Mechanical- Species that cannot breed
10: What are post-zygotic barriers? Name the types of post-zygotic barriers- give examples.
(Zygote Mortality, Hybrid Sterility)
Post-zygotic barriers occur which might cause the zygote to die.
Zygote Morality- Sperm is transferred
Hybrid Sterility- 2 different species that breed to make a new species
11: What is polyploidy? What happens? Where is this common?
Polyploidy is the process of genome doubling that gives rise to organisms with multiple sets of chromosomes.
A mistake in chromosome numbers.It is common in plants.
12: What is the theory of Punctuated Equilibrium? “Punctuated equilibrium” refers to a concept in evolutionary biology that is both controversial and widely misunderstood. Both punctuated equilibrium and its alternatives have significant drawbacks, either in plausibility or evidence.
2: What is the definition a species? A definition of species concepts, with links to examples, collections and related resources.
3: What are the two main types of barriers in reproductive isolation?
The 2 main types of barriers in reproductive isolation is geographic and post-zygotic/pre-zygotic.
4: What is gene flow? What is reproductive isolation? Gene flow is the transfer of alleles from one population to another population through immigration of individuals.Reproductive isolation refers to any mechanism that prevents two species from creating offspring together.
5: What is geographic isolation? (Give an example). Being separated from others by water, rift, canyon, or another geological barrier.
EX:The people of Finland, who are secluded to some degree from the rest of the world by water, develop certain diseases due to the lack of genetic material from other ethnicities and races.
6: What is allopatric speciation? (give an example)
Allopatric speciation is just a fancy name for speciation by geographic isolation, discussed earlier.
EX: they become subjected to different selective pressures
7: What is sympatric speciation? (give an example)
Sympatric speciation is the process through which new species evolve from a single ancestral species while inhabiting the same geographic region.
EX:Sympatric and sympatry are terms from biogeography, referring to organisms whose ranges overlap or are even identical, so that they occur together at least in some places.
8: What is peripatric/parapatric speciation? (give an example)
Peripatric speciation is a special version of the allopatric speciation mode and happens when one of the isolated populations has very few individuals.
EX:on an oceanic island compared to the mainland.
9: What are pre-zygotic barriers? Name the types of pre-zygotic barriers (explain each).
(Temporal, Mechanical, Behavioral)
A pre-zygotic barrier is something that prevents fertilization.
Temporal- Putting them in a lab will allow them to interbreed.
Behavior- Living in hybrid zones
Mechanical- Species that cannot breed
10: What are post-zygotic barriers? Name the types of post-zygotic barriers- give examples.
(Zygote Mortality, Hybrid Sterility)
Post-zygotic barriers occur which might cause the zygote to die.
Zygote Morality- Sperm is transferred
Hybrid Sterility- 2 different species that breed to make a new species
11: What is polyploidy? What happens? Where is this common?
Polyploidy is the process of genome doubling that gives rise to organisms with multiple sets of chromosomes.
A mistake in chromosome numbers.It is common in plants.
12: What is the theory of Punctuated Equilibrium? “Punctuated equilibrium” refers to a concept in evolutionary biology that is both controversial and widely misunderstood. Both punctuated equilibrium and its alternatives have significant drawbacks, either in plausibility or evidence.