Whale Biology and Genetics

In Monterrey, DNA detective Steve Palumbi investigates suspicious whale DNA, discovering a perfect match to a blue whale in GenBank. This shocking find suggests illegal trade in blue whales, a major conservation issue. Further analysis reveals a hybrid whale with a blue whale mother and a fin whale father, a rare occurrence in whale genetics. Scott Baker theorizes that hybrid whales exist due to low population numbers, limiting mating opportunities within species.

What did Steve Palumbi discover about the whale DNA he analyzed?

• It matched a blue whale sequence in GenBank.

• It was a new species of whale.

• It was unrelated to any known whale species.

• It was a perfect match to a fin whale.

Why is the discovery of blue whale DNA considered shocking?

• Blue whales are easy to find in the wild.

• Blue whales are known for their aggressive nature.

• Blue whales are not abundant enough to hunt.

• Blue whales are commonly hunted.

What was unique about the whale's mitochondrial DNA?

• It was completely different from any known whale.

• It indicated a blue whale mother and a fin whale father.

• It showed a mix of blue and humpback whale DNA.

• It was identical to a fin whale.

What is the significance of a hybrid whale in the genetics world?

• It is a sign of healthy whale populations.

• It is a rare cross between the two largest whale species.

• It represents a new species of whale.

• It is a common occurrence among whale species.

What is Scott Baker's theory on the existence of hybrid whales?

• They are a result of climate change.

• They are due to reduced populations and limited mating opportunities.

• They are created through human intervention.

• They are a natural evolution of whale species.

How long can adult blue whales grow?

• Up to 50 feet long

• Up to 70 feet long

• Up to 120 feet long

• Up to 100 feet long

What is the approximate length of fin whales?

• 70 feet

• 60 feet

• 80 feet

• 90 feet

Why might hybrid whales be unable to find mates of their own species?

• Due to their aggressive nature.

• Because of their unique genetic makeup.

• Because their populations have been reduced to very low numbers.

• Due to their preference for different habitats.