Human Adaptations and Genetic Concepts

The video explores human genetic adaptations to different environments, such as Tibetans' ability to thrive at high altitudes and the Bajau people's diving capabilities. It discusses how modern medicine reduces natural selection pressures, leading to genetic drift. The potential role of epigenetics in rapid adaptation is also considered, highlighting that human evolution is ongoing and influenced by technological advancements.

What is the primary reason native Tibetans can easily sprint up mountains?

• Specialized diet

• Genetic adaptations

• Intense physical training

• High-altitude equipment

How long have the genetic changes in Tibetans been evolving?

• 5,000 years

• 3,000 years

• 1,000 years

• 10,000 years

What adaptation helps people in Siberia and the high arctic survive extreme cold?

• Stronger bones

• Larger lungs

• Higher metabolic rate

• Thicker skin

What unique feature do the Bajau people have that allows them to stay underwater longer?

• Larger spleens

• Gills

• Larger lungs

• Webbed feet

Why did milk drinking become an advantageous adaptation in Europe?

• It provided a source of calcium for vitamin D production

• It was a substitute for water

• It helped in digestion of other foods

• It was a cultural practice

What is one way modern medicine has altered natural selection?

• By promoting genetic uniformity

• By enhancing physical fitness

• By reducing selective pressures

• By increasing genetic mutations

What is genetic drift?

• A type of natural selection

• A way to eliminate harmful mutations

• A method of genetic engineering

• A process where genetic differences vary randomly within a population

How might modern medicine increase genetic variety?

• By eliminating genetic differences

• By encouraging genetic uniformity

• By allowing harmful mutations to persist

• By promoting genetic mutations

What are epigenetic modifications?

• Changes to gene expression

• Changes to the DNA sequence

• Changes to physical traits

• Changes to metabolic rate

What is still uncertain about epigenetic modifications?

• Whether they can be passed to offspring

• Whether they can persist over many generations

• Whether they can occur during a lifetime

• Whether they can lead to observable differences