What does the allele term refer to?

“Allele” is the word that we use to describe the alternative form or versions of a gene. People inherit one allele for each autosomal gene from each parent, and we tend to lump the alleles into categories. Typically, we call them either normal or wild-type alleles, or abnormal, or mutant alleles.

What is an example of one allele?

An example is the human ABO blood group system; persons with type AB blood have one allele for A and one for B.

What is it called when there is only one allele in a population?

A fixed allele is an allele that is the only variant that exists for that gene in all the population. A fixed allele is homozygous for all members of the population.

What is the allele called that is expressed over another allele?

If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.

What are alleles quizlet?

What are alleles? An allele is an alternative form of a gene (one member of a pair) that is located at a specific position on a specific chromosome. These DNA codings determine distinct traits that can be passed on from parents to offspring.

What are the two types of alleles?

Alleles are described as either dominant or recessive depending on their associated traits.

What is heterozygous and homozygous?

We all have two alleles, or versions, of each gene. Being homozygous for a particular gene means you inherited two identical versions. It’s the opposite of a heterozygous genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene.

Is only one allele expressed?

In most cases, both alleles of a gene are transcribed; this is known as bi-allelic expression. However, a minority of genes show monoallelic expression. In these cases, only one allele of a gene is expressed.

Can you have one allele?

Different versions of the same gene are called alleles. Genes can have two or more possible alleles.

How are alleles expressed?

An allele can be dominant or recessive. Dominant alleles express a trait, even if there is only one copy. Recessive alleles can only express themselves if there are two copies—one from each parent.

What is an allele in genetics quizlet?

An allele is an alternative form of a gene (one member of a pair) that is located at a specific position on a specific chromosome. These DNA codings determine distinct traits that can be passed on from parents to offspring.

What is an allele quizlet bio?

Allele. one of two alternate forms of a gene that can have the same locus on homologous chromosomes and are responsible for alternative traits.