This topic contains a solution. Click here to go to the answer

Author Question: In 1987, a group of molecular geneticists at the University of California at Berkeley offered ... (Read 74 times)

dbose

  • Hero Member
  • *****
  • Posts: 597
In 1987, a group of molecular geneticists at the University of California at Berkeley offered support for the idea that anatomically modern humans arose fairly recently in Africa, then spread out and colonized the world. The geneticists analyzed genetic samples of 147 women whose ancestors came from Africa, Europe, the Middle East, Asia, New Guinea, and Australia. By estimating the number of mutations that had taken place in the mithochondrial DNA (mtDNA) of each of these samples, the researchers concluded that
 
  A. everyone alive today has mtDNA that descends from a woman (dubbed Mitochondrial Eve) who lived in sub-Saharan Africa around 200,000 years ago and that her descendants left Africa no more than 135,000 years ago.
  B. everyone alive today has mtDNA that descends from a woman (dubbed Mitochondrial Eve) who lived in Asia around 50,000 years ago and that her descendants left Asia 100,000 years ago.
  C. establishing a genetic clock to model human evolution is reliable only when focusing on 50,000 years into the past.
  D. everyone alive can count the Neandertal of western Europe as their ancestor.
  E. Neandertals coexisted with modern humans in the Middle East for at least 2,000 years.

Question 2

According to mtDNA analyses, when did the first modern humans leave Africa?
 
  A. 2 m.y.a.
  B. 1 m.y.a.
  C. over 735,000 years ago
  D. 535,000 years ago
  E. no more than 135,000 years ago



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Anton

  • Sr. Member
  • ****
  • Posts: 302
Answer to Question 1

Answer: A

Answer to Question 2

Answer: E




dbose

  • Member
  • Posts: 597
Reply 2 on: Aug 11, 2018
YES! Correct, THANKS for helping me on my review


emsimon14

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

For a complete list of videos, visit our video library