Since they occur on non-sex chromosomes every bird, both cocks and hens will carry two gene possibilities for each chromosome set. In otherwords one gene for each chromosome in a set of two each. During the replication process, genes which are located closely together on the same chromosome are sometimes pass along in groups like links in a chain. Autosomal genes and their alleles which are known to be linked togather are the pattern series, spread and recessive opal. Copyright 1999 by Ronald Huntley.
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