Ram A therefore has effectively become a surrogate ram .
In the following weeks ram A produces semen the usual way , but is using the stem cells of ram B and therefore producing semen carrying the genetics of ram B rather than those of his own .
Ram A has effectively become a surrogate ram .
In the following weeks ram A produces semen the usual way , but is using the stem cells of ram B and therefore producing semen carrying the genetics of ram B rather than those of his own .