PIGEON GENETICS Part 2 It is not my intention to write page after page of examples on the basic colour expectancies from certain pairings, but a few examples should be explanatory, without becoming boring. In all of the following examples, I will make reference to colour only, as this will apply to all patterns. Example Table 1. 1. Pure Blue Cock x Blue Hen. All young will be Blue. 2. Pure Blue Cock x Brown Hen. All young will be Blue, But all Cocks carry Brown. 3. Pure Blue Cock x Ash Red Hen. All Cocks will be Ash Red, And will carry Blue. All Hens will be Blue. Example 3 is a sex linked mating, where the colour of the offspring is opposite sex wise to that of there parents. Example Table 2. 4. Brown Cock x Brown Hen. All young will be Brown. 5. Brown Cock x Blue Hen. All Cocks will be Blue, And will carry Brown. All Hens will be Brown. 6. Brown Cock x Ash Red Hen. All Cocks will be Ash Red, And will carry Brown. All Hens will be Brown. Examples 5 & 6 again are sex linked matings. Example Table 3. 7. Pure Ash Red Cock. x Ash Red Hen. All young will be Ash Red. 8. Pure Ash Red Cock. x Blue Hen. All young will be Ash Red, But Cocks will carry Blue. 9. Pure Ash Red Cock. x Brown Hen. All young will be Ash Red, But Cocks will carry Brown. So from the three tables above, it can be seen thatit is a simple matter to predict the colourof the progeny of these matings, as all the Cocks are Homozygous (Pure) for there colour. When the Ash Red or Blue Cocks are Heterozygous (Impure) for colour we have other Possibilities. Example Table 4. 10. Ash Red Cock, Impure for Blue, x Ash Red Hen. All Cocks will be Ash Red. 50% of them are Pure. 50% are impure for Blue. 50% of the Hens are Ash Red. 11. Ash Red Cock Impure for Brown x Blue Hen. 50% of the Cocks are Ash Red Impure for Blue. 50% of the Cocks are Blue Impure for Brown. 50% of the Hens are Brown . 50% of the Hens are Ash Red. To Be Continued. D.L. Darbyshire. |