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What is a simple definition of an allele?

What is a simple definition of an allele?

Allele, also called allelomorph, any one of two or more genes that may occur alternatively at a given site (locus) on a chromosome. Alleles may occur in pairs, or there may be multiple alleles affecting the expression (phenotype) of a particular trait.

What is an example of allele in science?

An example of alleles for flower color in pea plants are the dominant purple allele, and the recessive white allele; for height they are the dominant tall allele and recessive short allele; for pea color, they are the dominant yellow allele and recessive green allele.

What is allele in biology BYJU’s?

Alleles are a pair of genes that occupy a specific location on a particular chromosome and control the same trait. All the alleles found in an organism make up the genotype. If a pair of alleles are similar, the organism’s genotype is called homozygous.

What are 2 examples of alleles?

Gene vs allele: chart

Gene Allele
Determines An organism’s genotype An organism’s phenotype
Number per genus locus One Two
Various Types Alleles Paternal vs maternal Dominant vs recessive
Examples Eye color, hair color, skin pigmentation Blue eyes, brown hair, dark skin

Which is the best example of an allele?

Frequency: The definition of alleles are pairs or series of genes on a chromosome that determine the hereditary characteristics. An example of an allele is the gene that determines hair color.

Where do alleles come from?

One allele for every gene in an organism is inherited from each of that organism’s parents. In some cases, both parents provide the same allele of a given gene, and the offspring is referred to as homozygous (“homo” meaning “same”) for that allele.

What is difference between alleles and genes?

A gene is a unit of hereditary information. The short answer is that an allele is a variant form of a gene. Explained in greater detail, each gene resides at a specific locus (location on a chromosome) in two copies, one copy of the gene inherited from each parent.

What are the examples of multiple alleles?

An example of multiple alleles is coat color in rabbits (Figure 1). Here, four alleles exist for the c gene. The wild-type version, C +C+, is expressed as brown fur. The chinchilla phenotype, cchc ch, is expressed as black-tipped white fur.

What is the difference between alleles and genes?

Except in some viruses, genes are made up of DNA, a complex molecule that codes genetic information for the transmission of inherited traits. Alleles are also genetic sequences, and they too code for the transmission of traits. The short answer is that an allele is a variant form of a gene.

Is eye color an allele?

The different variants of genes are referred to as alleles. The gey gene has one allele that gives rise to green eyes and one allele that gives rise to blue eyes. The bey2 gene has one allele for brown eyes and one for blue eyes.

Which is the best definition of an allele?

Science definitions for allele. allele. Any of the possible forms in which a gene for a specific trait can occur. In almost all animal cells, two alleles for each gene are inherited, one from each parent.

How is the way you look determined by alleles?

If you have an A allele and a B allele, you’ll have AB blood type. The way you look is determined by chemical instructions called genes. Genes are inherited from your parents, and variations of genes are called alleles. If you inherit alleles with conflicting instructions, the dominant allele will typically determine the trait.

Why are so many genes have different alleles?

Many genes have different alleles, which means that sometimes, the instructions are conflicting, and your body must decide which instructions it should follow. If one allele in a pair always makes a trait appear, that allele is said to be dominant. Many genes have different alleles.

Where does the term recessive alleles come from?

The other allele is RECESSIVE. The term derives from the Greek allos , another. a particular form of GENE. Alleles usually occur in pairs, one on each HOMOLOGOUS CHROMOSOME in a DIPLOID cell nucleus. When both alleles are the same the individual is described as being a HOMOZYGOTE; when each allele is different the individual is a HETEROZYGOTE.