Translation guide
In genetics, "heterozygous" describes having two different alleles for a particular gene. This guide explains how to express this concept in Japanese, from technical terms to simpler explanations.
The standard scientific term for having two different alleles at a gene locus.
The most common technical term, used in genetics and biology. Often used as a noun or in compound forms.
この個体はヘテロ接合です。
This individual is heterozygous.
A less common synonym using kanji. Seen in some textbooks.
異型接合体は両方の対立遺伝子を持ちます。
A heterozygote has both alleles.
Specifically refers to a heterozygous organism or cell.
ヘテロ接合体では、優性形質が現れます。
In a heterozygote, the dominant trait appears.
Explaining that an organism has two different alleles for a gene, often in educational contexts.
A formal pattern meaning "is heterozygous." Used in scientific writing.
この遺伝子座はヘテロ接合である。
This locus is heterozygous.
Literally "has different alleles." A clear, descriptive phrase suitable for explanations.
その人は、その遺伝子について異なる対立遺伝子を持っています。
That person has different alleles for that gene.
A casual, abbreviated way to say "is heterozygous," common in lab conversations.
このマウスはヘテロだ。
This mouse is heterozygous.
Contrasting heterozygous with homozygous, often needed in explanations.
When comparing, use the parallel terms ヘテロ接合 (heterozygous) and ホモ接合 (homozygous).
この遺伝子について、ヘテロ接合かホモ接合かを調べます。
We check whether it is heterozygous or homozygous for this gene.
In modern Japanese genetics, katakana terms like ヘテロ接合 are more common than kanji terms like 異型接合. However, both are understood.
"Heterozygous" is a technical term. In everyday conversation, Japanese speakers would more likely explain the concept with phrases like 「遺伝子の型が異なる」 (the gene types are different) rather than using the technical term.