what is the difference between polygenic traits and multiple alleles?
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In multiple alleles the same strand of DNA is involved. For example the blood type is found on the same strand of DNA. ... The polygenic inheritance is found on multiple strands of DNA. For example the formation of antibiotics to fight bacteria and other foreign bodies are found on multiple places on the DNA.
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Different versions of the same gene are called alleles. Genes can have two or more possible alleles. Individual humans have two alleles, or versions, of every gene. Because humans have two gene variants for each gene, we are known as diploid organisms.
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Most genes have two or more variations, called alleles. For example, the gene for hairline shape has two alleles – widow's peak or straight. ... For example, the allele for widow's peak is dominant and the allele for straight hairline is recessive.
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Qualitative traits are frequently controlled by one or just a few genes meaning they are simply-inherited traits. Conversely, quantitive traits are traits with phenotypes that can be measured numerically. ... Usually, quantitative traits are polygenic meaning they are controlled by many genes and gene interactions.
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Homozygous consists of two copies of the same allele that codes for a particular trait. Heterozygous consists of two different copies of alleles that code for a particular trait. ... A trait which is either a combination of a series of dominant or regressive alleles is produced when two organisms breed.
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In most cases, both alleles of a gene are transcribed; this is known as bi-allelic expression. However, a minority of genes show monoallelic expression. In these cases, only one allele of a gene is expressed.
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In codominant inheritance, two different versions (alleles) of a gene are expressed, and each version makes a slightly different protein. Both alleles influence the genetic trait or determine the characteristics of the genetic condition.
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Most genes are the same in all people, but a small number of genes (less than 1 percent of the total) are slightly different between people. Alleles are forms of the same gene with small differences in their sequence of DNA bases. These small differences contribute to each person's unique physical features.
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Traits controlled by a single gene with more than two alleles are called multiple allele traits. An example is ABO blood type. There are three common alleles for this trait, which can be represented by the letters A, B, and O. As shown in Table below, there are six possible ABO genotypes but only four phenotypes.
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Traits are determined by an individual's genotype, the summation of the genes in our DNA. ... A chromosome is composed of DNA and contains the genetic material for an organism. Humans have twenty-three pairs of chromosomes. Twenty-two of the pairs are called autosomes.
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A gene is a portion of DNA that determines a certain trait. An allele is a specific form of a gene. Genes are responsible for the expression of traits. Alleles are responsible for the variations in which a given trait can be expressed.
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A polygenic trait is one whose phenotype is influenced by more than one gene. Traits that display a continuous distribution, such as height or skin color, are polygenic.
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Homozygous consists of two copies of the same allele that codes for a particular trait. Heterozygous consists of two different copies of alleles that code for a particular trait.
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The correct answer is B. Multiple allele means more than two forms of the same gene in the population and polygenic inheritance means more than one gene contributes to the phenotype of a trait.
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Intelligence in the normal range is a polygenic trait, meaning that it is influenced by more than one gene, and in the case of intelligence at least 500 genes. Further, explaining the similarity in IQ of closely related persons requires careful study because environmental factors may be correlated with genetic factors.
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multiple alleles refer to that with more than 2 alleles for one gene/phenotype. ... POLYGENIC means a trait controlled by more than 2 genes, whereas MULTIPLE ALLELES refers more than 2 type of alleles of a gene. The former one has more than 2 GENES and the later on has more than 2 TYPE OF A PARTICULAR GENE!
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An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.