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Twins & Genetics
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<blockquote data-quote="Dsth" data-source="post: 1617363" data-attributes="member: 38038"><p>I agree with you that twins are a pain in the **s. with that said, I have my favorite cows in my small herd. My favorite BA cow had twins her second calving (one dead bull and one live heifer.) I have kept every heifer out of her except that twin (probably 6 or more since she seems to have a heifer each time,) None of her offspring has had a set of twins. nor has she had a second set herself. My favorite RA cow had several sets of twins (always same sex and markings if they have some white blended in,) and yes, her offsping do have twins frequently. There are three ways that a cow can have twins. 1- she can release one egg that gets fertilized by two sperm cells entering the egg at exactly the same time (non identical twins.) 2- she can release two eggs and each egg fertilized by two different sperm cells (non identical twins) 3- she can release one egg that gets fertilized by one sperm cell. that fertilized egg can divide and split into two growing embryos (identical twins.) The first is not hereditary. the next two are hereditary. If this calf is from your favorite cow, I would keep. Even if it is hereditary, the likelihood of her having twins on a regular basis would be slim in my opinion. Since she is 8 years old already, I would not be too worried about keeping her offspring.</p></blockquote><p></p>
[QUOTE="Dsth, post: 1617363, member: 38038"] I agree with you that twins are a pain in the **s. with that said, I have my favorite cows in my small herd. My favorite BA cow had twins her second calving (one dead bull and one live heifer.) I have kept every heifer out of her except that twin (probably 6 or more since she seems to have a heifer each time,) None of her offspring has had a set of twins. nor has she had a second set herself. My favorite RA cow had several sets of twins (always same sex and markings if they have some white blended in,) and yes, her offsping do have twins frequently. There are three ways that a cow can have twins. 1- she can release one egg that gets fertilized by two sperm cells entering the egg at exactly the same time (non identical twins.) 2- she can release two eggs and each egg fertilized by two different sperm cells (non identical twins) 3- she can release one egg that gets fertilized by one sperm cell. that fertilized egg can divide and split into two growing embryos (identical twins.) The first is not hereditary. the next two are hereditary. If this calf is from your favorite cow, I would keep. Even if it is hereditary, the likelihood of her having twins on a regular basis would be slim in my opinion. Since she is 8 years old already, I would not be too worried about keeping her offspring. [/QUOTE]
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