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| | Genetic Inheritance has Rules - but is not an exact science |
 | | The male carrying an Opaline gene can, of course inherit the gene from either mother or father if it was inherited from the mother, since the mother possessed only one X chromosome. |
 | | A simple diagram (Diagram 1), can only properly explain the inheritance pattern of single genes, and in the above diagram we have considered two genes (Opaline and Cinnamon) and a third genetically inherited character, sex, all of which characters are determined by the X chromosome. |
 | | For the sake of identification, the paired chromosomes of the parent are shown as one fl chromosome and one white chromosome, the fl chromosome inherited from, say it's own father, and the white chromosome inherited from the mother, or vice versa. |
| www.budgerigars.co.uk /genetics/pilk.html (1154 words) |
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