Why Do Corgi Mixes Always Look Like Corgis?

The video explores the genetic basis of corgi traits, focusing on their short legs caused by a dominant retrogene derived from the FGF4 gene. This gene, which affects growth factors, has been historically favored in breeding, leading to widespread dwarfism in certain dog breeds. However, this genetic trait also poses health risks, such as spinal disease. The video highlights the long-standing human preference for these traits and the ongoing scientific efforts to understand their implications.

What is the primary reason corgis have short legs?

• They are a result of a dominant gene for dwarfism.

• They are due to a lack of exercise.

• They are caused by a specific diet.

• They are a result of environmental factors.

What is a retro gene?

• A gene that is only found in corgis.

• A gene that is always inactive.

• A gene that forms when mRNA is converted back into DNA.

• A gene that causes all dogs to have short legs.

Which chromosome is associated with the retro gene causing dwarfism in corgis?

• Chromosome 1

• Chromosome 12

• Chromosome 22

• Chromosome 18

What is one potential downside of the retro gene in dogs?

• It causes them to be more aggressive.

• It is linked with spinal disease.

• It makes them less intelligent.

• It causes them to have a shorter lifespan.

Why have humans historically bred dogs with the dwarfism trait?

• For their cute appearance.

• For their intelligence.

• For their ability to run fast.

• For their hunting skills.