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<blockquote data-quote="Aero" data-source="post: 266951" data-attributes="member: 2076"><p>one simple way to look at this is using Coefficient of Inbreeding (CIB). CIB is just a numerical representation of how inbred an animal is. As this number gets larger, you have more and more homozygous gene pairs. when recessive genes become homozygous they are then able to be expressed. when they are expressed, many things can show up that would normally be covered up by the heterozygous gene pair. Simply put, the larger the CIB, the more likelihood of having recessive genes stacked and expressed. </p><p></p><p>An outcross mating that has no animals in common between the parents will have a CIB of 0.0%. A grandsire-granddaughter mating => 12.5% CIB. A sire-daughter mating (as stated in the original post) => 25.0%.</p><p></p><p>Even more simply put, the sire-daughter mating is twice as likely to show a recessive gene as a grandsire-granddaughter mating.</p><p></p><p>basic CIB explanation: <a href="http://www.tenset.co.uk/fspeed/" target="_blank">http://www.tenset.co.uk/fspeed/</a></p></blockquote><p></p>
[QUOTE="Aero, post: 266951, member: 2076"] one simple way to look at this is using Coefficient of Inbreeding (CIB). CIB is just a numerical representation of how inbred an animal is. As this number gets larger, you have more and more homozygous gene pairs. when recessive genes become homozygous they are then able to be expressed. when they are expressed, many things can show up that would normally be covered up by the heterozygous gene pair. Simply put, the larger the CIB, the more likelihood of having recessive genes stacked and expressed. An outcross mating that has no animals in common between the parents will have a CIB of 0.0%. A grandsire-granddaughter mating => 12.5% CIB. A sire-daughter mating (as stated in the original post) => 25.0%. Even more simply put, the sire-daughter mating is twice as likely to show a recessive gene as a grandsire-granddaughter mating. basic CIB explanation: [url=http://www.tenset.co.uk/fspeed/]http://www.tenset.co.uk/fspeed/[/url] [/QUOTE]
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