Menu
Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Forums
Cattle Boards
Beginners Board
Looking for suggestions on calves
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support CattleToday:
Message
<blockquote data-quote="Warren Allison" data-source="post: 1823651" data-attributes="member: 40587"><p>To some maybe, black and/or polled ae "defects". But being black or polled poses no health risks, or leads to disability or mortality. Inherited diseases, conditions, and abnormalities that are genetic, are all caused by recessive genes. If these were all dominant, there would be no cattle. That red and black color thing though is a good illustration. Black, BB is dominant over red bb. All red cattle are homozygous bb. Black cattle can be homo BB or hetera Bb. </p><p></p><p>Breed a BB to a Bb, and all calves will be black. 75% of them homo BB, and 25% hetera bb. ( red carriers)</p><p></p><p>Breed a Bb to a Bb, and 25% will be homo BB, black 50% will be hetera (red carriers) Bb black, and 25% will be bb red.</p><p></p><p>Breed a BB black to a bb red, and all calves will be hetera black, Bb.</p><p></p><p>Breed a Bb black to a bb red, and 50% wil l be Bb black, and 50% bb red. </p><p></p><p> So let's say bb represents a known genetic birth defect or disease, and you will understand why you shouldn't breed a carrier ( one copy of the b gene). And, you will see way that defect could only be tied to the recessive bb gene. If the defect were dominant,, ALL cattle, whether homo BB or hetera Bb, would have it. Only a calf from a cross between two hetrea Bb cattle, would stand a 25% chance of being normal.</p><p></p><p>This also illustrates why in breeding sons and daughters to mommas and daddies, is like playing Russian Roulette with 5 in the chamber. The exception would be, when using registered stock and all have been tested and certified to be non carriers.</p></blockquote><p></p>
[QUOTE="Warren Allison, post: 1823651, member: 40587"] To some maybe, black and/or polled ae "defects". But being black or polled poses no health risks, or leads to disability or mortality. Inherited diseases, conditions, and abnormalities that are genetic, are all caused by recessive genes. If these were all dominant, there would be no cattle. That red and black color thing though is a good illustration. Black, BB is dominant over red bb. All red cattle are homozygous bb. Black cattle can be homo BB or hetera Bb. Breed a BB to a Bb, and all calves will be black. 75% of them homo BB, and 25% hetera bb. ( red carriers) Breed a Bb to a Bb, and 25% will be homo BB, black 50% will be hetera (red carriers) Bb black, and 25% will be bb red. Breed a BB black to a bb red, and all calves will be hetera black, Bb. Breed a Bb black to a bb red, and 50% wil l be Bb black, and 50% bb red. So let's say bb represents a known genetic birth defect or disease, and you will understand why you shouldn't breed a carrier ( one copy of the b gene). And, you will see way that defect could only be tied to the recessive bb gene. If the defect were dominant,, ALL cattle, whether homo BB or hetera Bb, would have it. Only a calf from a cross between two hetrea Bb cattle, would stand a 25% chance of being normal. This also illustrates why in breeding sons and daughters to mommas and daddies, is like playing Russian Roulette with 5 in the chamber. The exception would be, when using registered stock and all have been tested and certified to be non carriers. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cattle Boards
Beginners Board
Looking for suggestions on calves
Top