New research proves dogs, even tiny ones, are descended from wolves.
. An analysis of 1,431 genome sequences spanning 13 species of both ancestral and modern canids revealed a variant, or gene mutation, within the antisense that interacts with the IGF-1 gene. This was “really the key that unlocked everything,” Ostrander said.
These alleles have conferred “morphological plasticity” to modern dogs; because both alleles are circulating within the global dog population, people can selectively breed dogs of widely different sizes. For example, there are three sizes of schnauzers: toy, miniature and standard. The toy and miniature schnauzers analyzed in the study contained the small allele, while the giant schnauzers contained the large allele.
The study suggests this large allele most likely emerged in wolves more than 53,000 years ago, likely due to natural selection. These wolves lived during the Pleistocene, also known as “t.” Lower temperatures likely caused this allele to become a fixed feature of northern wolves, while the small allele persisted in wolves living in southern, warmer regions.
Brasil Últimas Notícias, Brasil Manchetes
Similar News:Você também pode ler notícias semelhantes a esta que coletamos de outras fontes de notícias.
Margot Robbie Puts a Beachy Twist on French Girl Styling at ChanelMargot Robbie puts a beachy twist on French girl styling at Chanel. See the details of her look here:
Consulte Mais informação »
You Can Finally Charge Your Power Tools Using USBRyobi's tiny batteries are designed for a new line of smaller power tools.
Consulte Mais informação »