All chromosomes consist of genes and non coding material. Animals with chromosomes arranged in the double helix pattern have two almost identical genes on the chromosomes opposite from the other. When those two genes in particular are discussed, they are called alleles. Frequently one is expressed and one is not, or one is dominant and the other is not.
The gene loci are the sites where the alleles reside on the DNA strand. Alleles at the same gene locus on each chromosome pair will determine the phenotypic expression of that gene pair. Of course this explanation is incomplete when more complex interactions between alleles come into play
Alleles are different versions of the same gene
The structures are called chromosomes.
homologous chromosomes exchange alleles during crossing over.
There is no particular relationship between organisms that have identical alleles for a particular trait.
Heredity
All chromosomes consist of genes and non coding material. Animals with chromosomes arranged in the double helix pattern have two almost identical genes on the chromosomes opposite from the other. When those two genes in particular are discussed, they are called alleles. Frequently one is expressed and one is not, or one is dominant and the other is not.
The gene loci are the sites where the alleles reside on the DNA strand. Alleles at the same gene locus on each chromosome pair will determine the phenotypic expression of that gene pair. Of course this explanation is incomplete when more complex interactions between alleles come into play
Alleles are different versions of the same gene
The structures are called chromosomes.
homologous chromosomes exchange alleles during crossing over.
The only relationship is the 'chrom', meaning 'color'
at the same place on homologous chromosomes source: Alleles of a gene reside at the same locus on homologous chromosomes.
Genetic information is the combining of alleles and their outcome. Chromosomes form alleles and chromosomes are formed inside of a cell.
Sex linked genes occur only on the X or the Y sex chromosomes.
Alleles are generally inherited in pairs, except for alleles on the X and Y sex chromosomes in males.
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