How Goldfish Went From Pretty To Invincible And Back Again

Goldfish originated as hybrids in China and evolved unique traits due to whole genome duplication. They adapted to various temperatures, allowing them to spread globally. Their ability to survive low oxygen environments made them popular pets and research models. However, selective breeding has reduced their genetic diversity and survival skills.

What molecule is responsible for the glistening red scales of some goldfish hybrids?

• Carotene

• Chlorophyll

• Guanine

• Melanin

What is the term used to describe the genetic condition of goldfish having four sets of chromosomes?

• Alotetraploid

• Tetraploid

• Hexaploid

• Diploid

How do goldfish manage to survive in environments with almost no oxygen?

• By storing oxygen in their scales

• By increasing their heart rate

• By converting lactic acid into ethanol

• By hibernating

What marketing strategy helped popularize goldfish as pets in the United States?

• Goldfish beauty contests

• Goldfish races at fairs

• Sending goldfish to people who wrote to their congressperson

• Free goldfish with every aquarium purchase

Why are goldfish considered useful in scientific research?

• They are easy to train

• They are good at absorbing substances

• They have a long lifespan

• They can change colors

What is a consequence of breeding goldfish from the same gene pool?

• Improved swimming speed

• Increased size

• Loss of genetic diversity

• Enhanced color patterns

What is a common issue faced by fancy varieties of goldfish?

• Inability to reproduce

• Swim bladder disorder

• Excessive growth

• Increased aggression