Kibiolojia,mwanaume ndie anayeleta mtoto Wa kiume,kwani yeye ndiye mwenye Y chromosome ambayo ikikutana na X chromosome basi mtoto huwa Wa kiume.bahati mbaya sometimes njia ya uke ya mwanamke huwa inatoa changamoto Sana kwa mbegu hizi za kiume ambapo husababisha kufia njiani.mbegu za kiume ziko...
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