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.
Q. Do all genes have alleles?
Genes can have two or more possible alleles. Individual humans have two alleles, or versions, of every gene. Because humans have two gene variants for each gene, we are known as diploid organisms. The pair of alleles present on an individual’s chromosomes dictates what eye color will be expressed.
Q. Are alleles on the same chromosome?
When genes are close together on the same chromosome, they are said to be linked. That means the alleles, or gene versions, already together on one chromosome will be inherited as a unit more frequently than not.
Q. How do alleles affect traits?
Genes do control different traits of an organism, such as hair color or eye color, but the actual expression of a trait depends on which allele is dominant. For example, the gene for eye color in humans can have an allele for brown eyes and an allele for blue eyes, or an allele for brown eyes and one for green eyes.
Q. What is another word for allele?
alleleomorphs
Q. Is an allele A trait?
Traits are basically your phenotype. They include things like hair color, height, and eye color. Alleles are versions of genes. They are what directly specify what traits you have.
Q. What is another word for dominant allele?
Alternate Synonyms for “dominant allele”: dominant; allele; allelomorph.
Q. What is the recessive allele?
A recessive allele is a variety of genetic code that does not create a phenotype if a dominant allele is present. An allele is a specific variation of a gene, or specific segment of DNA. Different alleles produce slightly different proteins, which function in different ways.
Q. What is an example of a dominant allele?
Dominant alleles show their effect even if the individual only has one copy of the allele (also known as being heterozygous?). For example, the allele for brown eyes is dominant, therefore you only need one copy of the ‘brown eye’ allele to have brown eyes (although, with two copies you will still have brown eyes).
Q. What homozygous dominant?
An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele. Heterozygous means that an organism has two different alleles of a gene.
