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عدد الرجال في العالم انخفض خلال المئة سنة الماضية

12 يناير 2016

أعلن العلماء أن عدد الرجال في العالم انخفض خلال المئة سنة الماضية بصورة ملحوظة.

ويعتقد العلماء أن سبب هذا التناقص يعود إلى خاصية الكروموسومات Y، التي تتميز بهشاشتها، وإلى التغيرات الحاصلة في الوسط المحيط والتي تضعفها وتحطمها، في حين أن الكروموسومات الأنثوية "X " أمنع منها بكثير.

وقد تم توضيح سبب انخفاض عدد الرجال بواسطة التيلوميرات الموجودة في جسم كل إنسان. هذه التيلوميرات تتقلص وتضعف عند الرجل مع مرور الزمن، في حين أن لدى المرأة مجموعتين من كروموسومات "X"، لذلك عند تلف إحداها تحل الثانية محلها فورا.

أما الرجال فليس لديهم مجموعة كروموسومات "احتياطية" مما يسبب انخفاض عددهم. وترى حسابات العلماء أن الرجال سينقرضون بعد مضي 5 ملايين سنة.

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