Can Holsteins be A2A2? Understanding A2 Milk Genetics
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4 min read
According to a 2023 study published in *Frontiers in Animal Science*, the frequency of the A2A2 genotype in genotyped Australian Holstein cows increased from 32% in 2000 to 52% in 2017. This demonstrates that not only *can* Holsteins be A2A2, but the trait is becoming more prevalent due to selective breeding.
