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Which hormone is responsible for variation in dog size?

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Created: 2022-07-16 04:09:10

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5 апр. 2007 г. · Their investigation found that variation in one gene — IGF-1, which codes for a protein hormone called insulin-like growth factor 1, is very .


Why do dogs vary in size?

Ranging from toy to giant, dogs have the biggest size variation of any mammal and the team of US and British experts believe it is due to variations in one gene. After analysing DNA samples from 3,200 dogs, they pinpointed IGF-1, a gene that makes a hormone called insulin-like growth factor 1.

What causes dog variation?

Many exhibit limited genetic diversity, as dog breeds are typically descended from a small number of founders, created by crossing closely related individuals. Further, breeds often experience population bottlenecks as the popularity of the breed waxes and wanes.

What genes determine dog size?

Our genetic analysis includes genes that, together, explain over 85 percent of the variation in dog body size.Body Size 1. Gene: IGF1. This is one of several genes that influence the size of a dog. ... Body Size 2. Gene: IGFR1. ... Body Size 3. Gene: STC2. ... Body Size 4. Gene: GHR - E191K. ... Body Size 5. Gene: GHR - P177L.

What affects dog size?

The age of the dog when breeding plays a key part in litter size. The older the dam, the smaller the litter, especially in larger breeds. Dams bred from 2-5 years usually have the largest litters.

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