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. … Alleles can also refer to minor DNA sequence variations between alleles that do not necessarily influence the gene’s phenotype.
What is alleles short answer?
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. 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 is alleles 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 A allele definition in psychology?
n. an alternate form of a gene that occupies a given position on each of a pair of homologous chromosomes. Each person typically has two alleles of each gene: One is inherited from the mother and the other from the father.
What is the best definition of 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.
Which is the best example of an allele?
An example of an allele is the gene that determines hair color. Either of a pair of genes located at the same position on both members of a pair of chromosomes and conveying characters that are inherited in accordance with Mendelian law. Any of the possible forms in which a gene for a specific trait can occur.
What are the two types of alleles called?
An organism which has two different alleles of the gene is called heterozygous. Phenotypes (the expressed characteristics) associated with a certain allele can sometimes be dominant or recessive, but often they are neither.
What are the three types of alleles?
There are three different alleles, known as IA, IB, and i. The IA and IB alleles are co-dominant, and the i allele is recessive.
Where are alleles located?
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.
Where are alleles located quizlet?
Where are the alleles located? One on each of the homologous chromosomes on which the locus for that gene is found.
What is heterozygous in psychology?
The word heterozygous is used to describe a person who inherited two different alleles for a particular trait. When a person inherits two different alleles for a trait they are said to be heterozygous for the trait (with hetero meaning other or different). …
What is recessive in psychology?
A Recessive Gene is a gene that carries information in the DNA, i.e., hair, skin or eye color, blood types, straight or curly hair, etc. but is hidden (not visibly present). A child inherits only half of their DNA information from each parent and in this combination generally display the dominant genes they received.