![]() Genetics Info & Tutorial: Something-zygous |
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There are a few more terms that are commonly used when discussing genetics: heterozygous and homozygous. A fertilized egg is called a zygote. The word zygote is part of the terms heterozygous and homozygous. These terms describe the relationship of a pair of corresponding genes. Hetero- means “different” --as in “heterosexual”-- and homo- means “same” --as in homosexual. So naturally, a homozygous animal has two copies of the same gene, whereas a heterozygous animal has two different copies of genes for the same trait (at the same locus.) Since heterozygous is often used in discussions and is a long word, it is abbreviated to “het.”
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