p.1 & Body's response to low oxygen
Why do people often feel sick the first time they climb a mountain?
There is less available oxygen (lower air pressure) at high elevations
What term describes diversity in genetic traits?
Heritable (inherited) variation
If someone who lives at sea level (low elevation) travels to a mountain, what will their body do?
Breathe faster and produce more red blood cells
Identify a difference in the circulatory systems between the Tibetans and people visiting the mountains
The Tibetans had wider blood vessels; more blood flow, and slower heart rates
Compare the average blood flow of people from Tibet with people from the US
Tibetans had higher blood flow
Overall, people of Tibetan ancestry have what structural difference in their blood vessels?
The blood vessels are wider on average
Which genotype had the fewest infant deaths? (AA, AB, or AB)
BB (0.32)
The body's response to a change that lets it restore homeostasis
Which traits become more common over generations?
Traits that are helpful for survival and reproduction
The graph shows that as blood flow increases, what happens to oxygen delivery?
More blood flow = more oxygen delivery
What are alleles A and B?