How is the apple maggot fly an example of sympatric speciation?
Hawthorn flies and apple flies are considered to be two races of the species complex Rhagoletis pomonella. The flies are textbook examples for the process of sympatric speciation, a process by which new species evolve in the same geographic region from a common ancestor species.
What are some examples of sympatric speciation?
A possible example of sympatric speciation is the apple maggot, an insect that lays its eggs inside the fruit of an apple, causing it to rot. As the apple falls from the tree, the maggots dig in the ground before emerging as flies several months later.
Are apple and hawthorn maggot flies separate species?
According to the phylogenetic species concept, are hawthorn and apple maggot flies separate species? YES – They are GENETICALLY DISTINGUISHABLE and have a DISTINCT GENETIC PROFILE, so they’re SEPARATE SPECIES according to this concept.
Which of the following does sympatric speciation involve?
Sympatric speciation, from the Greek ‘same place’, involves the splitting of an ancestral species into two or more reproductively isolated groups without geographical isolation of those groups.
What are the results of sympatric speciation?
Sympatric speciation is distinctive as it occurs when two populations of the same species are found in the same territory but are able to split into two different groups and genetically develop so differently that they can no more interbreed and become different species.
Which reproductive isolating mechanism separates the apple and hawthorn maggot flies?
There is no geographic isolation or physical separation between hawthorn and apple maggot flies. However, the flies are genetically distinct and have recognizably different genetic profiles. Feder et al.
What kind of natural selection is occuring in the apple maggot fly?
The sympatric hypothesis posits that ecological specialization after a host shift can result in speciation in the absence of complete geographic isolation. The apple maggot, Rhagoletis pomonella, is a model for sympatric speciation in progress.
How is gene flow affected by sympatric speciation?
Gene flow results in the introduction and loss of alleles whenever the members immigrate or emigrate. However, as for sympatric speciation where speciation occurs not by geographic isolation or physical separation, gene flow may still be reduced.
Is sympatric speciation a evolution?
Sympatric speciation is the evolution of a new species from a surviving ancestral species while both continue to inhabit the same geographic region. In evolutionary biology and biogeography, sympatric and sympatry are terms referring to organisms whose ranges overlap so that they occur together at least in some places.
What is and give an example of allopatric speciation and sympatric speciation?
This separation eventually results in two distinct species. Here, the only example of allopatric speciation is that regarding the squirrels separated by the river. The example with the hawks refers to sympatric speciation, where no geographical barrier exists, but speciation can still occur due to other stressors.
Which is an example of mechanical reproductive isolation?
MECHANICAL ISOLATION EXAMPLES The genitalia of a male bushbaby will only fit into the genitalia of a female belonging to the same species. If two bushbabies belonging to different species try to mate, they won’t be able to do so.
What kind of natural selection is occurring in the apple maggot fly?
What speciation is due to geographic isolation?
Allopatric speciation, also known as geographic speciation, is speciation that occurs when biological populations of the same species become isolated due to geographical changes such as mountain building or social changes such as emigration.
What types of isolation are involved in sympatric speciation?
Is the apple maggot a model of sympatric speciation?
The apple maggot, Rhagoletis pomonella, is a model for sympatric speciation in progress. Hawthorn (Crataegus spp.) is the native host for R. pomonella in N. Americas. But in the mid-1800s, a new population formed on introduced, domesticated apple (Malus pumila).
What is an example of sympatric speciation?
The importance of speciation without the complete geographical separation of diverging populations (sympatric speciation) has become increasingly accepted. One of the textbook examples of recent speciation in sympatry is the apple maggot fly Rhagoletis pomonella, in which genetically differentiated …
Do maggot flies have a sense of smell?
The apple maggot fly—how an altered sense of smell could drive the formation of new species. The two races of flies maintain separate populations on the basis of preferred host fruits, which they detect through smells – apple flies prefer apple scents, while hawthorn flies prefer hawthorn fruit smells.
What do the flies tell us about sympatric speciation?
The flies are textbook examples for the process of sympatric speciation, a process by which new species evolve in the same geographic region from a common ancestor species.