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Describe three patterns of natural selection on polygenic traits Which one leads to two distinct phenotypes?
Wiki User
∙ 9y ago
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.
Wiki User
∙ 9y ago
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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.
How does selection result in 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.
Is there any biological plus genetic basis for human race and why?
No. Race is just a human concept used to label phenotypes that are clearly distinct.
Which exception to Mendelism involves the expression of traits that are controlled by multiple genes?
The exception to Mendelism that involves the expression of traits controlled by multiple genes is called polygenic inheritance. In this type of inheritance, multiple genes contribute to the observable trait, and the trait often shows a continuous variation instead of distinct categories. Examples of polygenic traits include height, skin color, and intelligence.
Is natural selection a cause of speciation?
Yes. Without natural selection there might probably still be change, but it would produce a fine gradient of diverging morphologies in every 'direction' of change. Natural selection limits the 'directions' of change, thereby producing distinct morphologies and thus distinct species.
Culture of the mixedwood plains ecozone?
The culture is very distinct in many ways. Ways that I can not describe. But they are distinct! :D
Which word is used in linguistic and science to describe distinct concepts?
The word "term" is often used in both linguistics and science to describe distinct concepts or ideas. In linguistics, a term might refer to a specific word or phrase used to represent a concept, while in science, a term could denote a specific variable or factor in an equation or theory.
The perceptual process includes three distinct steps Place them in the correct order?
Selection organization interpretation
Which year did Consrantine John Phipps describe the polar bear distinct?
1774
Who exercises the franhise?
DESCRIBE FIVE DISTINCT STAGE IN GROWTH OF THE AMERICAN ELECTORATE
When more than one pair of alleles controls a trait is called?
When more than one pair of alleles controls a trait, it is called polygenic inheritance. This means that multiple genes contribute to the expression of a trait, leading to a continuous range of variation rather than distinct categories. Examples of traits controlled by polygenic inheritance include height, skin color, and intelligence.
Which type of selection can result in branching evolution if it goes on long enough?
Natural selection is the type of selection that can result in a branching evolutionary tree if it goes on long enough. This is because organisms may eventually evolve into a distinct species.
