Depends on the gene. Can be as few as 2, or more than that. Height, hair colour etc have multiple alleles.
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An individual can have a maximum of two alleles for one trait, as they inherit one allele from each parent. These alleles can be the same (homozygous) or different (heterozygous) for a specific trait.
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An organism has two alleles for one trait. If the two alleles are the same, the individual is homozygous for that trait, and if they are different, the individual is heterozygous.
No, often many other alleles will also determine the same trait. For example, many alleles put together will determine a person's skin color.
You get one allele for 1 trait from your mother. Alleles are alternative forms of a gene, and you inherit one allele for each trait from each parent.
Multiple alleles can provide many different phenotypes for a trait because each allele can code for a different version of a trait, leading to a wide range of possible combinations and variations in the expression of that trait.
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Non-Mendelian traits are:A trait with no clearly dominant alleleA trait with four allelesA trait controlled by many genes
alleles.
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Polygenic traits result in more variation because so many more alleles are involved in the process of reproduction.