When they are heterozygous.
heterogenous
The organism that has two different alleles for the same trait is called heterozygous. This also refers to a cell or an individual that has two different forms of gene.
An organism that has two different alleles for a single trait is called heterozygous. This means that the organism inherited different versions of the gene responsible for that trait from each parent.
An organism with two different alleles for a trait is said to be heterozygous for that trait. This means that it has one dominant allele and one recessive allele. The dominant allele will usually determine the organism's phenotype for that trait.
It depends on the organism but humans have two alleles.
Organisms with alleles BB are considered homozygous dominant. This means that the dominant allele (B) is expressed in the phenotype. Dominant alleles mask the effects of recessive alleles in heterozygous individuals.
There is no particular relationship between organisms that have identical alleles for a particular trait.
Heterozygous.
A heterozygous organism has two different alleles for a given gene. The opposite of a heterozygous organism is a homozygous organism which has two alleles that are the same for that specific gene. Genes can exist in more than one form and the different forms are called alleles. Alleles code for different types of the same characteristic
Genes
A population with different alleles will have traits
Alleles are different forms of a gene that can occupy the same position on homologous chromosomes. Alleles can be dominant or recessive, influencing the expression of a particular trait in an individual. Diploid organisms inherit two alleles for each gene, one from each parent, which can be the same (homozygous) or different (heterozygous).