Can alleles be identical or different for any given gene?

Can alleles be identical or different?

Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. … Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive.

Will the alleles be the same at each gene or can they be different?

These gene variants still code for the same trait (i.e. hair color), but they differ in how the trait is expressed (i.e. brown vs blonde hair). Different versions of the same gene are called alleles. Genes can have two or more possible alleles. Individual humans have two alleles, or versions, of every gene.

Are alleles genetically identical?

An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene. An organism which has two different alleles of the gene is called heterozygous.

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Can two alleles of the same gene be on the same chromosome?

An allele is one of two, or more, versions of the same gene at the same place on a chromosome. It can also refer to different sequence variations for several-hundred base-pair or more region of the genome that codes for a protein. Alleles can come in different extremes of size.

Can alleles be identical or different for any given gene in a somatic cell?

They can be identical or different for any given gene in a somatic cell. They can be dominant or recessive. They can represent alternative forms of a gene. Only A and B are correct.

How can two different alleles of the same gene be?

An individual inherits two alleles for each gene, one from each parent. If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous.

What is the relationship between genes and alleles?

A gene is a portion of DNA that determines a certain trait. An allele is a specific form of a gene. Genes are responsible for the expression of traits. Alleles are responsible for the variations in which a given trait can be expressed.

What is most likely to differ between two alleles for the same gene?

What is different between two alleles of the same gene? The information they carry. For example, one allele might carry the information for blue eye pigment, while the other carries the information for brown eye pigment.

Why do we have 2 alleles for each gene?

Since diploid organisms have two copies of each chromosome, they have two of each gene. 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.

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What is the best definition of allele?

An allele is one of a pair of genes that appear at a particular location on a particular chromosome and control the same characteristic, such as blood type or color blindness. Alleles are also called alleleomorphs. Your blood type is determined by the alleles you inherited from your parents.

How are alleles represented in genetics?

Each pair of alleles represents the genotype of a specific gene. For example, in sweet pea plants, the gene for flower color has two alleles. One allele codes for purple flowers and is represented by the uppercase letter F, whereas the second codes for white flowers and is represented by the lowercase letter f.