Heterozygote: An individual who has two different forms of a particular gene, one inherited from each parent. A heterozygote for cystic fibrosis (CF) has the CF gene on one chromosome 7 and the normal paired gene on the other chromosome 7.
http://www.medicinenet.com/script/main/art.asp?articlekey=3747
Homozygous and Heterozygous. If an organism has two copies of the same allele, for example AA or aa, it is homozygous for that trait. If the organism has one copy of two different alleles, for example Aa, it is heterozygous. Keep in mind that an organism can't simply be 'homozygous,' period. For each of the organism's thousands of genes, it is either homozygous or heterozygous at that genetic locus.
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A diploid organism is heterozygous at a gene locus when its cells contain two different alleles of a gene. The cell or organism is called a heterozygote specifically for the allele in question, therefore, heterozygosity refers to a specific genotype.
https://en.wikipedia.org/wiki/Zygosity
If both alleles of a diploid organism are the same, the organism is homozygous at that locus. If they are different, the organism is heterozygous at that locus. If one allele is missing, it is hemizygous, and, if both alleles are missing, it is nullizygous.
https://en.wikipedia.org/wiki/Zygosity
An individual that is homozygous-dominant for a particular trait carries two copies of the allele that codes for the dominant trait. This allele, often called the dominant allele, is normally represented by a capital letter (such as P for the dominant allele producing purple flowers in pea plants).
https://en.wikipedia.org/wiki/Zygosity
In diploid organisms, one allele is inherited from the male parent and one from the female parent. Zygosity is a description of whether those two alleles have identical or different DNA sequences. In some cases the term zygosity is used in the context of a single chromosome.
https://en.wikipedia.org/wiki/Zygosity
The offspring of a heterozygous carrier of a genetic disorder have a 50% chance of inheriting the allele associated with the disorder if the other parent does not carry the allele. Compare homozygous.
http://medical-dictionary.thefreedictionary.com/heterozygous
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https://quizlet.com/21947215/heterozygous-homozygous-dominant-recessive-flash-cards/
having two different alleles at corresponding loci on homologous chromosomes. An individual who is heterozygous for a trait has inherited an allele for that trait from one parent and an alternative allele from the other parent. An individual who is heterozygous for a genetic disease caused by a dominant allele, such as Huntington's disease, manifests the disorder. A person who is heterozygous for a hereditary disorder produced by a recessive allele, such as sickle cell anemia, is asymptomatic or exhibits reduced symptoms of the disease.
http://medical-dictionary.thefreedictionary.com/heterozygous
A cell is said to be homozygous for a particular gene when identical alleles of the gene are present on both homologous chromosomes. The cell or organism in question is called a homozygote. True breeding organisms are always homozygous for the traits that are to be held constant.
https://en.wikipedia.org/wiki/Zygosity
heterozygous  definition
Heterozygous is an individual who has two different forms of a particular gene, one inherited from each parent. Heterozygous is defined as an individual who has two different forms of a particular gene, one inherited from each parent.