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How are multiple alleles different from polygenic traits?
Multiple alleles are genes that have more than two alleles. An example of this would be blood types, with ABO as three separate alleles.Polygenic traits are traits whose phenotype rely on alleles from different genes. An example of this would be hair type, which relies on genes from different parts of chromosomes.The main difference is that multiple alleles are genes with 3 or more alleles; polygenic traits do not necessarily have more alleles, but they rely on on multiple genes.
In a species of rat height is a polygenic trait. what does it mean for this trait to be polygenic?
Usually, traits are polygenic when there is wide variation in the trait. For example, humans can be of many different sizes. Height is a polygenic trait, controlled by at least three genes with six alleles. If you are dominant for all of the alleles for height, then you will be very tall. Should help students for the year 2022. (Note: May change for upcoming years) Hope it helped!
What is the difference between alleles and multiple alleles?
Alleles refer to different versions of the same gene. So a single gene can have multiple alleles. For example in fruit flies there is a single gene that controls eye color, and the eye color of the fly depends on the alleles they have for that gene (since they have two copies of every gene, being diploid). A polygenic trait refers to any inheritable trait that is controlled by multiple genes, and each of these genes can have multiple alleles. For example, eye color in humans is a polygenic trait. There are at least three different genes, each with multiple alleles, that determine eye color in humans. Polygenic traits don't follow patterns of mendelian inheritance. So in summation the difference is multiple alleles refers to different versions of one gene and polygenic traits refers to a single trait which is controlled by multiple genes (each with multiple alleles) Yes, or: Multiple alleles are "the existence of more than two alleles (versions of the gene) for a genetic traits. Polygenic traits are "[characteristics of organisms that are] influenced by several genes." So multiple alleles are more than two alleles for one trait, and polygenic traits are one trait that is influenced by multiple genes. This information came from my biology textbook, "Biology: Principles and Explorations" by Holt, Rinehart, and Winston.
How many alleles go into polygenic inheritance?
three or more, or multiple
What are traits inherited by multiple alleles?
Traits inherited by multiple alleles are those that are controlled by three or more different forms of a gene (alleles) at a single locus. Examples include human blood type, where the ABO gene has three common alleles (IA, IB, and i), and coat color in rabbits, which is determined by four alleles of the C gene (C, cch, ch, and c).
What three ways are human traits controlled?
Human traits are controlled by a combination of genetic factors (inherited from parents), environmental factors (such as diet and lifestyle), and epigenetic factors (changes in gene expression without changes in the underlying DNA sequence). These factors interact in complex ways to influence the development and expression of human traits.
What is a trait controlled by three or more alleles have?
multiple alleles
What are multiple allele traits?
A polygenic trait that require the additive effects of many alleles to be expressed. Height is an example of a polygenic trait. Or, a trait that has many alleles to fill the loci on chromosomes. Blood types are examples of this. A, B and O are all alleles that git the two chromosomal loci, but only any two at once whether homozygous or heterozygous.
What can polygenic inheritance can explain?
Polygenic inheritance is a reason for some of the variety in human appearance. Eye color, hair color and skin color are all polygenic traits. That is why there are dozens of possible eye colors instead or just two or three. The mixing of alleles from multiple genes increases the number of possible phenotypes.
What are three ways natural selection can effect the polygenic traits?
Natural selection can lead to individuals with certain combinations of polygenic traits having higher fitness, increasing their likelihood of passing on their genes to the next generation. It can drive the frequency of alleles that contribute to favorable trait combinations up or down in a population over time. Natural selection can influence the distribution of phenotypic variations for polygenic traits, favoring those that provide a survival or reproductive advantage in a specific environment.
What are multiple-allele traits?
Traits governed by multiple alleles are controlled by three or more alleles, rather than two. An example in humans is the ABO blood group system. There are three alleles in the ABO blood group system, IA, IB, IO. These three alleles can produce six genotypes, AA, AO, BB, BO, AB, OO. These genotypes can produce four different phenotypes, A (genotypes AA or AO), B (genotypes BB or BO), AB, (genotype AB) and O (genotype OO).
What are traits that have three or more phenotype may be the results of alleles?
Traits that exhibit three or more phenotypes are often influenced by multiple alleles, which are different forms of a gene. A classic example is the ABO blood group system in humans, where three alleles (I^A, I^B, and i) result in four possible phenotypes: A, B, AB, and O. Similarly, traits like coat color in certain animals can show multiple variations due to the interaction of several alleles. This genetic complexity allows for a wider range of observable traits in a population.
