Noun
(genetics) an organism having two different alleles of a particular gene and so giving rise to varying offspring
Source: WordNetAs with all PCR based methods, highly degraded DNA or very small amounts of DNA may cause allelic dropout (causing a mistake in thinking a heterozygote is a homozygote) or other stochastic effects. Source: Internet
An organism that has two different alleles for a gene is said be heterozygous for that gene (and is called a heterozygote). Source: Internet
As an X-linked disorder, ALD presents most commonly in males, however approximately 50% of heterozygote females show some symptoms later in life. Source: Internet
This is called heterozygote advantage or over-dominance, of which the best-known example is the malarial resistance observed in heterozygous humans who carry only one copy of the gene for sickle-cell anaemia. Source: Internet
There are examples of eugenic acts that managed to lower the prevalence of recessive diseases, although not influencing the prevalence of heterozygote carriers of those diseases. Source: Internet
Thus you can tell that each allele is present in the heterozygote. Source: Internet