Can a gene have 4 alleles?

These alleles can recombine from generation to generation to produce different genotypes. You can use a punnett square to determine how many different genotypes 4 alleles at a single locus can produce. … For example, the genotypes 4,3 and 3,4 are the same, and should only be counted once.

Can genes have multiple alleles?

When the copies of a gene differ from each other, they are known as alleles. A given gene may have multiple different alleles, though only two alleles are present at the gene’s locus in any individual. … An example of dominant allele expression is flower color in pea plants.

Can a gene have 3 alleles?

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.

Is AA a genotype?

What is a Genotype? … There are four hemoglobin genotypes (hemoglobin pairs/formations) in humans: AA, AS, SS and AC (uncommon). SS and AC are the abnormal genotypes or the sickle cells. We all have a specific pair of these hemoglobin in our blood which we inherited from both parents.

What do multiple alleles mean?

: an allele of a genetic locus having more than two allelic forms within a population.

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What genes have more than two alleles?

Alleles are the pairs of genes occupying a specific spot called locus on a chromosome. Typically, there are only two alleles for a gene in a diploid organism. When there is a gene existing in more than two allelic forms, this condition is referred to as multiple allelism.

Which gene has the most alleles?

Most notably, the genes coding for the major histocompatibility complex (MHC) are in fact the most polymorphic genes known. MHC molecules are involved in the immune system and interact with T-cells.

Why are there 3 alleles for blood type?

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 co-dominant, and the i allele is recessive. The possible human phenotypes for blood group are type A, type B, type AB, and type O.

What are the three alleles?

The ABO system in humans is controlled by three alleles, usually referred to as IA, IB, and IO (the “I” stands for isohaemagglutinin). IA and IB are codominant and produce type A and type B antigens, respectively, which migrate to the surface of red blood cells, while IO is the recessive allele and produces no antigen.

What are multiple alleles examples?

Examples of Multiple Alleles

The human ABO blood type is a good example of multiple alleles. Humans can have red blood cells that are of type A (IA), type B (IB), or type O (i). These three different alleles can be combined in different ways following Mendel’s Laws of Inheritance.

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