• Polar bears and brown bears can produce a hybrid offspring
• Polar bears evolved from brown bears
• The timing of when polar bears first appeared is vital because it determines when they have experienced warm periods with little sea ice historically
• Mitochondrial DNA (mtDNA) – relationships based on differences in a group of genes
• The polar bear genome discovered alterations in genes related to the development of the heart, cardiovascular function and lipid metabolism – this is why they can eat massive amounts of fat without getting sick.
• Evidence that there is climate change so brown bears can expand their range northward
• Their anatomy and DNA shows that they are genetically closely related
• Increase mating with the brown
• Polar bears evolved from brown bears
• The timing of when polar bears first appeared is vital because it determines when they have experienced warm periods with little sea ice historically
• Mitochondrial DNA (mtDNA) – relationships based on differences in a group of genes
• The polar bear genome discovered alterations in genes related to the development of the heart, cardiovascular function and lipid metabolism – this is why they can eat massive amounts of fat without getting sick.
• Evidence that there is climate change so brown bears can expand their range northward
• Their anatomy and DNA shows that they are genetically closely related
• Increase mating with the brown