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According to Wikipedia: "Disruptive selection describes changes in population genetics in which extreme values for a trait are favored.
It is believed that disruptive selection is one of the main forces that drive sympatric speciation in natural populations.
Sympatric speciation events are vastly more common in plants.
A rare example of sympatric speciation in animals is the divergence of "resident" and "transient" Orca forms in the northeast Pacific.
Resident and transient orcas inhabit the same waters, but avoid each other and do not interbreed. The two forms hunt different prey species and have different diets, vocal behaviour, and social structures."
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Which type of natural selection occurs when the extreme opposites in a phenotype range are selected?
Disruptive selection occurs when the extreme phenotypes in a population are favored over intermediate phenotypes. This can lead to the divergence of a population into two distinct groups with different traits.
How do directional and disruptive selection differ in their impact on the evolution of a population?
Directional selection and disruptive selection are two types of natural selection that can drive evolution in a population. Directional selection occurs when individuals with a certain trait are favored over others, leading to a shift in the population towards that trait. This can result in the gradual evolution of the population towards that specific trait. Disruptive selection, on the other hand, occurs when individuals with extreme traits are favored over those with intermediate traits. This can lead to the population splitting into two distinct groups with different traits, potentially resulting in the evolution of two separate species. In summary, directional selection leads to a gradual shift towards a specific trait in a population, while disruptive selection can result in the divergence of a population into two distinct groups with different traits.
What do directional selection and disruptive selection have in common-?
directional selection and disruptive selection both decrease genetic variation - apex
What are the different types of natural selection and how do they impact the evolution of species?
There are three main types of natural selection: directional selection, stabilizing selection, and disruptive selection. Directional selection occurs when one extreme trait is favored over others, leading to a shift in the population towards that trait. Stabilizing selection favors the average trait, reducing genetic variation in a population. Disruptive selection favors extreme traits, leading to the divergence of a population into two distinct groups. These types of natural selection impact evolution by influencing which traits are passed on to future generations. Over time, they can lead to the adaptation of species to their environment and the emergence of new species.
What type of selection can create 2 new species from one population?
There are several types of selections that can do this. It includes allopatric speciation where the population is separated by physical barrios, sympatric speciation where variations occur in the population, and allopolyploid when two species merge.
Which type of natural selection occurs when the extreme opposites in a phenotype range are selected?
Disruptive selection occurs when the extreme phenotypes in a population are favored over intermediate phenotypes. This can lead to the divergence of a population into two distinct groups with different traits.
How do directional and disruptive selection differ in their impact on the evolution of a population?
Directional selection and disruptive selection are two types of natural selection that can drive evolution in a population. Directional selection occurs when individuals with a certain trait are favored over others, leading to a shift in the population towards that trait. This can result in the gradual evolution of the population towards that specific trait. Disruptive selection, on the other hand, occurs when individuals with extreme traits are favored over those with intermediate traits. This can lead to the population splitting into two distinct groups with different traits, potentially resulting in the evolution of two separate species. In summary, directional selection leads to a gradual shift towards a specific trait in a population, while disruptive selection can result in the divergence of a population into two distinct groups with different traits.
What do directional selection and disruptive selection have in common-?
directional selection and disruptive selection both decrease genetic variation - apex
What are the different types of natural selection and how do they impact the evolution of species?
There are three main types of natural selection: directional selection, stabilizing selection, and disruptive selection. Directional selection occurs when one extreme trait is favored over others, leading to a shift in the population towards that trait. Stabilizing selection favors the average trait, reducing genetic variation in a population. Disruptive selection favors extreme traits, leading to the divergence of a population into two distinct groups. These types of natural selection impact evolution by influencing which traits are passed on to future generations. Over time, they can lead to the adaptation of species to their environment and the emergence of new species.
Which form of natural selection is most likely to play a role in speciation?
Reproductive isolation through sexual selection is often an important factor in speciation. This type of natural selection can lead to the evolution of reproductive barriers that prevent individuals from different populations from successfully interbreeding, ultimately resulting in the formation of distinct species.
How is disruptive selection different from directional selection?
disruptive selection favors the extremes of a range of selection Disruptive selection refers to natural selection that favors phenotypic extremes. Example (off the top of my head, but based loosely on reality): Consider a population of seed-eating birds with beaks that range in size, so that big beaks are best adapted to eating big seeds, small beaks are best adapted to small seeds, and medium beaks are best adapted to medium seeds. Now suppose that the source of medium seeds goes extinct (perhaps because of a fungal pathogen). The bird phenotype with medium beaks looses its food source; selection favors the big and small beaks.
What removes individuals with average trait values creating two populations with extreme traits?
Disruptive selection is a type of natural selection that removes individuals with average trait values, favoring individuals with extreme traits. Over time, this process can lead to the divergence of a population into two distinct groups, each with their own extreme trait values.
Describe three patterns of natural selection on polygenic traits Which one leads to two distinct phenotypes?
One pattern of natural selection polygenic traits is directional selection, in which one end of the spectrum leads to increased fitness and the other end decreased fitness. Disruptive selection is when both ends of the spectrum lead to increased fitness and the middle leads to decreased fitness and it leads to two distinct phenotypes being selected for. It's opposite is stabilizing selection, in which the middle has the best fitness and the two extremes have decreased fitness.
Misunderstanding on couples lead to separation?
What kind of misunderstanding? How honest are the two of you? Those are big questions. Without enough honesty any situation can lead to separation or divorce.
Which two forms of selection lead to two distinct phenotype?
if the pressure of natural selection is strong enough and lasts long enough , this situation can cause the single curve too split in two. i other words , selection creates two distinct phenotypes If the extremes of a trait are preferred to intermediate values, the ends of the spectrum live on as distinct phenotypes while the mid-range dies off. Darwin noted this in finch populations of the Galapagos, where islands with plants offering large seeds resulted in finches with large beaks, while small-seed islands had small-beaked finches. He believed they were of the same species, and had adapted to these extremes of beak size because of their environments.
What are three events that lead to speciation?
Separation, Adaptation, Division
What are three events that can lead to speciation?
Species (phylogenetically and genetically distinct animals from a common ancestor) form when barriers exist to prevent outbreeding. These are usually environmental (e.g. mountain ranges, oceans, climatic barriers) or biological (e.g. interbreeding of two species results in an infertile offspring).
