XO type

Japanese: XO 型 - えっくすおーがた
XO type

…In humans, females are 44A+XX and males are 44A+XY (A indicates an autosome). However, in males, the Y chromosome may be missing, which is called the XO type, and is common in grasshoppers such as the prairie locust. Conversely, females may be heterozygous and males may be homozygous.

*Some of the terminology explanations that refer to the "XO type" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ヒトでは女は44A+XX,男は44A+XY(Aは常染色体を示す)で表される。しかし雄でY染色体が見いだされない場合があり,これをXO型といい,ナキイナゴなどバッタ類にこの型が多い。これとは逆に,雌が異型,雄が同型の場合がある。…

※「XO 型」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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