What trait is normally controlled by multiple alleles?
A trait that is controlled by more than one gene is called polygenic which translates to “multiple genes”. The genes work together to make one trait. Examples are skin, eye and hair color.
What does it mean when a gene is controlled by multiple alleles?
There are traits in humans and other organisms that have three or more different types of alleles (genes). When a trait has three or more distinct alleles, we refer to it as having multiple alleles inheritance. The human ABO blood type alleles/trait is an example of a trait with multiple alleles.
What are multiple alleles traits?
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.
Is controlled by three alleles ABO?
Human blood is controlled by three alleles that create the ABO blood types. A and B are co-dominant, while the third allele, O, is recessive to the other two alleles. Below are a number of parent combinations. For each, indicate whether it could produce the resulting child.
Which trait is controlled by three or more genes quizlet?
Multiple allele inheritance is controlled by many genes, while polygenic inheritance is controlled by three or more different forms of a single gene. Multiple allele inheritance results in offspring with only recessive alleles, while polygenic inheritance results in offspring with both dominant and recessive alleles.
When or more alleles determine a trait the trait is said to have multiple alleles?
Traits controlled by more than two alleles have multiple alleles. Many genes have multiple phenotypic effects, a property called pleiotropy. Epistasis is when a gene at one location (locus) alters the phenotypic expression of a gene at another locus.
What does it mean for a trait to have multiple alleles quizlet?
Terms in this set (5)
Multiple Alleles. – When three or more alleles control a trait. Example. Blood Types in humans.
What is the difference between multiple alleles and multiple genes?
In case of multiple alleles, the same DNA strand is involved, whereas polygenic inheritance is found on multiple DNA strands. Multiple alleles involve multiple alternate forms of a gene, while polygenic traits are regulated by a group of non-allelic genes. … Hence, in blood type, there is one gene but three alleles.
What genes have multiple alleles?
Two human examples of multiple-allele genes are the gene of the ABO blood group system, and the human-leukocyte-associated antigen (HLA) genes.
What is the difference between multiple allele traits and polygenic traits give at least one example of each?
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.
Is blood type controlled by multiple alleles?
Human blood type is determined by codominant alleles. There are three different alleles, known as IA, IB, and i. The IA and IB alleles are codominant, and the i allele is recessive. The possible human phenotypes for blood group are type A, type B, type AB, and type O.