Multi-allele traits have more than two alleles at a population level, although individuals still only get one from each parent. These alleles may exhibit classic dominance, they may mask each other, they may add to or subtract from each other, or some combination of these effects.
What is a multiple allele trait give an example of one?
An excellent example of multiple allele inheritance is human blood type. Blood type exists as four possible phenotypes: A, B, AB, & O. There are 3 alleles for the gene that determines blood type.
Why is multiple allele trait described as such?
Traits controlled by more than two alleles have multiple alleles. Although any one person usually has only two alleles for a gene, more than two alleles can exist in the population’s gene pool. Theoretically, any base change will result in a new allele.
What is the best description of multiple alleles?
noun Genetics. any one of a series of three or more alternative or allelic forms of a gene, only two of which can exist in any normal, diploid individual.
What are multiple alleles describe with an example?
Multiple alleles refer to the occurrence of three or more than three alleles for a particular gene. Alleles are different or contrasting forms of a gene. For example, for the gene encoding for height, one allele can be for tallness, whereas the other can be for dwarfness.
Why can multiple alleles result in many different phenotypes for a trait?
Why can multiple alleles result in many different phenotypes for a trait? This can happen because the more allele options for a specific gene the more possible combinations and therefore possible phenotypes the organism that has that gene could inherit.
Which is an example of multiple alleles quizlet?
What is an example of multiple alleles in the human body? Blood type. … -The Rh factor is a type of protein on the surface of red blood cells.
Why it is advantageous to have 2 alleles per trait?
Since genes come in more than one version, an organism can have two of the same alleles of a gene, or two different alleles. This is important because alleles can be dominant, recessive, or codominant to each other.
Which is not an example of multiple alleles?
Like ABO blood group, MN blood group also shows multiple allelism. Explanation: In MN blood group system there are only two alleles M and N which are codominant. Thus, this is not an example of multiple alleles but ABO blood grouping is.
Is skin color an example of multiple alleles?
Polygenic Inheritance: Human skin color is a good example of polygenic (multiple gene) inheritance. Assume that three “dominant” capital letter genes (A, B and C) control dark pigmentation because more melanin is produced.