| http://www.w3.org/ns/prov#value | - Since individuals have been selected on the basis of a single characteristic that we know is governed by both genetic and environmental factors, these hens are an excellent model for studying the number of genes that have contributed to this extreme change in the size of the animals, explains Professor ??rjan Carlborg of SLU, who initiated the genetic studies of the hen lines together with Profe
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