How are alleles classified?

How are alleles classified?

Alleles can be classified into dominant, recessive, codominant, or incomplete dominant depending on which of the allele the phenotype of the heterozygote resembles.

What does AA mean in alleles?

AA- homozygous dominant. Aa- heterozygous dominant (individual has both dominant and recessive gene, but only one is expressed)

What are the three types of 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.

How are alleles represented by letters?

When writing a genotype, the dominant allele is usually represented by a capital letter, while the recessive allele has a lowercase letter. The pink allele is dominant, so it would get a capital P, but the purple allele is recessive, so it would get a lowercase p.

Which is an example of an allele name?

Allele designations begin with a letter and contain alphanumeric characters. Punctuation marks occur in certain cases where they convey meaning. Allele designations appear as superscripted short alphanumeric strings following the gene symbol of which they are an allele and serve as an acronym for the allele name. Example: Atp7a Mo or Egfr tm1Mag.

How is the nomenclature of HLA alleles determined?

Nomenclature for Factors of the HLA System Nomenclature of HLA Alleles Each HLA allele name has a unique number corresponding to up to four sets of digits separated by colons. The length of the allele designation is dependent on the sequence of the allele and that of its nearest relative.

When do alleles begin with a lower case letter?

Allele designations begin with a lower case letter if the allele is a recessive and begin with a capital letter otherwise. Example: Wnt3avt is the allele symbol for the recessive vestigial tail allele of the Wnt3a gene, while Atp7aMo is the allele symbol for the dominant mottled allele of the Atp7a gene.

Where do punctuation marks go in an allele name?

Allele designations begin with a letter and contain alphanumeric characters. Punctuation marks occur in certain cases where they convey meaning. Allele designations appear as superscripted short alphanumeric strings following the gene symbol of which they are an allele and serve as an acronym for the allele name.