An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
What is the relationship between an allele a gene and a chromosome explain your answer?
The chromosome in each pair carries the same gene in the same location. These genes could be the same, or different versions. Alleles are different versions of the same gene. For example, the gene for eye colour has an allele for blue eye colour and an allele for brown eye colour.
Homologous chromosomes have the same genes arranged in the same order, but they have slightly different DNA sequences. Different versions of the same gene are called alleles (uh-LEELZ); homologous chromosomes often contain different alleles.
What is the relationship between genes and allele?
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.
Different forms of a gene are called alleles. … The alleles an individual has at a locus is called a genotype. The genotype of an organism is often expressed using letters. The visible expression of the genotype is called an organism’s phenotype.
Are chromosomes and alleles the same?
An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given locus (position) on a chromosome. Usually alleles are sequences that code for a gene, but sometimes the term is used to refer to a non-gene sequence.
What do the terms gene and allele have in common quizlet?
What do the terms gene and allele have in common? Both could refer to the same DNA sequence.
What is the difference between a genotype and an allele?
The key difference between allele and genotype is that the allele is one of the variant forms of a gene located at the same genetic locus of a chromosome while genotype is the genetic constitution of a particular trait.
How are alleles represented in genetics?
Alleles are often represented by upper and lower case letters. The upper case letters represent the dominant form while the lower case letters represent the recessive form. The expression of a genotype is called the phenotype.