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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.
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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.
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.
The color of wheat grains shows variability between red and white with multiple phenotypeswhat is the inheritance pattern?
The inheritance pattern of wheat grain color showing variability between red and white with multiple phenotypes is most likely controlled by multiple genes, exhibiting polygenic inheritance. This means that the trait is influenced by the combined effects of multiple genes, leading to a continuous range of phenotypes rather than distinct categories.
Polygenic inheritance can explain?
Polygenic inheritance is a trait where multiple genes are being used. ex. Height: your neither "short" or "tall" your somewhere in the middle. It's not like pea plants where you are either tall or short. You are a variety. When graphing polygenic inheritance, you will find that there is a bell curve because there are man heights in between tall and short.
What are the characteristics of polygenic traits?
Polygenic traits are determined by the interaction of multiple genes, each contributing a small effect towards the phenotype. They often display a continuous range of phenotypes rather than distinct categories. Polygenic traits are influenced by both genetic and environmental factors.
An inheritance pattern in which a gene has more than two alleles?
Polygenic inheritance is an inheritance pattern in which a trait is controlled by multiple genes, each with two or more alleles. This results in a continuous range of phenotypes rather than distinct categories.
How do you describes the inheritance of continuously varying traits using Mendel's rules of inheritance?
Mendel's rules of inheritance, such as the law of segregation and the law of independent assortment, apply to discrete traits with distinct phenotypes. For continuously varying traits, such as height or weight, the concept of polygenic inheritance is more relevant. Polygenic inheritance involves multiple genes contributing to the trait, resulting in a wide range of phenotypic variation.
What is Polygenic Inheritence?
Polygenic inheritance refers to the inheritance of a trait that is controlled by multiple genes, each with a small effect on the phenotype. Traits such as height, skin color, and intelligence are often influenced by multiple genes working together. This type of inheritance results in a continuous range of phenotypes rather than distinct categories.
What is a term used to describe the influences of multiple genes on behavior?
Polygenic inheritance is the term used to describe the influences of multiple genes on behavior. It refers to the inheritance of traits that are controlled by more than one pair of genes, each contributing a small effect. This type of inheritance results in a continuous range of possible outcomes rather than distinct categories.
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.
What is disruptive selection and how does it impact the evolution of species in biology?
Disruptive selection is a type of natural selection where extreme phenotypes are favored over intermediate ones, leading to the divergence of a population into two distinct forms. This can result in the formation of new species as individuals with extreme traits are better adapted to different environmental conditions, driving the evolution of separate lineages.
How does polygenic inheritance differ from Mendelian inheritance?
polygenic inheritance is when more than one genes are responsible for a character/phenotype. for example human skin color. if one want to draw a pedigree for that, he will not be able to succeed. although individual genes at molecular level is inherited according to mendel's laws. and mendelian inheritance simply follows mendels laws. also the character is controlled by one gene only. for example pea plant height.
