Human Family Tree Video Worksheet
How many generations, and years, back in human history do we find Scientific Eve? -
correct answer-6,000 Generations & 200,000 Years
Where do we find the root of the Human Family Tree? - correct answer-Eastern & Southern
Africa
What is used as the genetic markers to trace the history of the human family tree? - correct
answer-Mutations on DNA
Genetically speaking, how similar are all members of the human family? - correct
answer-99.9%
What are haplogroups, and how are they determined? - correct answer-Haplogroup = unique
genetic population (line of descent)
Groups are determined using mutations in Y chromosome and mitochondrial DNA
6. How can mutations of mtDNA (mitochondrial DNA) be used as molecular clocks? - correct
answer-Mutations occur at a steady rate. If we know the rate and the number of changes,
then we can determine relative times
7. What haplogroup does Carrie belong to? - correct answer-Haplogroup J
9. How long did modern humans exist before they started to journey out of Africa? - correct
answer-140,000 years
10. 130,000 years ago there was a catastrophic drought in Africa. What do scientists believe
the population size of modern
humans was then? - correct answer-2,000 Individuals
11. Why do scientists believe some groups of modern humans decided to leave Africa? -
correct answer-Climate change - extreme drought
12. What haplogroup does Tau belong to? - correct answer-M Star
13. What do recent ideas suggest about how Tau's ancestor travelled from Africa to the
Arabian peninsula? - correct answer-They walked! There was a shallow, 17-mile water basin
that they crossed on foot.
14. Where did Tau's ancestors migrate to after leaving Africa? - correct answer-Southeast
Asia, then Australia
15. Why do sea levels drop, as much as 300 feet, during the Ice Ages? - correct
answer-Most of the water was locked into the polar ice caps
How many generations, and years, back in human history do we find Scientific Eve? -
correct answer-6,000 Generations & 200,000 Years
Where do we find the root of the Human Family Tree? - correct answer-Eastern & Southern
Africa
What is used as the genetic markers to trace the history of the human family tree? - correct
answer-Mutations on DNA
Genetically speaking, how similar are all members of the human family? - correct
answer-99.9%
What are haplogroups, and how are they determined? - correct answer-Haplogroup = unique
genetic population (line of descent)
Groups are determined using mutations in Y chromosome and mitochondrial DNA
6. How can mutations of mtDNA (mitochondrial DNA) be used as molecular clocks? - correct
answer-Mutations occur at a steady rate. If we know the rate and the number of changes,
then we can determine relative times
7. What haplogroup does Carrie belong to? - correct answer-Haplogroup J
9. How long did modern humans exist before they started to journey out of Africa? - correct
answer-140,000 years
10. 130,000 years ago there was a catastrophic drought in Africa. What do scientists believe
the population size of modern
humans was then? - correct answer-2,000 Individuals
11. Why do scientists believe some groups of modern humans decided to leave Africa? -
correct answer-Climate change - extreme drought
12. What haplogroup does Tau belong to? - correct answer-M Star
13. What do recent ideas suggest about how Tau's ancestor travelled from Africa to the
Arabian peninsula? - correct answer-They walked! There was a shallow, 17-mile water basin
that they crossed on foot.
14. Where did Tau's ancestors migrate to after leaving Africa? - correct answer-Southeast
Asia, then Australia
15. Why do sea levels drop, as much as 300 feet, during the Ice Ages? - correct
answer-Most of the water was locked into the polar ice caps
