Chapter 6 Online quizzes

* not completed

How much do human and chimpanzee DNA sequences differ by?

0.1% correct incorrect

1.4% correct incorrect

1.8% correct incorrect

3.4% correct incorrect

* not completed

Which continent did humans originate in?

Africa correct incorrect

America correct incorrect

Asia correct incorrect

Australia correct incorrect

* not completed

When did modern humans (Homo sapiens) first appear in the fossil record?

3,000,000 years ago correct incorrect

1,000,000 years ago correct incorrect

300,000 years ago correct incorrect

100,000 years ago correct incorrect

* not completed

How much Neanderthal DNA do most humans outside Africa carry?

0% correct incorrect

0.2% correct incorrect

2% correct incorrect

20% correct incorrect

* not completed

Which of the following practices are NOT advised when working with ancient DNA?

Choosing remains preserved in cold and dry environments correct incorrect

Using hardest bones correct incorrect

Sterilizing bones with high temperature correct incorrect

Working in a clean lab correct incorrect

* not completed

Which of these genes is thought to have contributed to the evolution of large brain size in humans?

ASB1 correct incorrect

BNC2 correct incorrect

FOXP2 correct incorrect

NOTCH2NL correct incorrect

* not completed

Which present day human populations have highest level of Denisovan ancestry?

Europeans correct incorrect

Asians correct incorrect

Native Americans correct incorrect

Papuans and Aboriginal Australians correct incorrect

* not completed

How may genetic variants present at 100% frequency in one continent, but absent elsewhere, are known?

0 correct incorrect

8 correct incorrect

Around 100 correct incorrect

More than 1,000 correct incorrect

* not completed

Why could people change from hunting and gathering to cultivating plants and looking after animals (i.e. agriculture) 10,000 years ago?

They became more intelligent correct incorrect

They first started using tools at this time correct incorrect

They moved to new parts of the world suitable for agriculture correct incorrect

The climate became suitable for agriculture: warmer and more stable correct incorrect

* not completed

Which of the following is NOT an example of positive selection?

High altitude adaptation in Himalaya correct incorrect

High prevalence of sickle cell allele in Africa correct incorrect

Skin lightening in Europe within the last 10,000 years correct incorrect

Ability to digest milk in adulthood in pastoralist communities correct incorrect