What Darwin Never Knew (2)
Name__________________
1.
Darwin showed that nature was a battlefield with all creatures in _______________________.
2.
The creatures which survived were the most likely to __________________________________.
3.
The Galapagos finches use their beaks as _______________________ for survival.
4.
What did Darwin observe among his own children? ____________________________________.
5.
Darwin suggested that over time variations would cause the unfit species to _______________
6.
What was a “hole” in Darwin’s theory? He didn’t know ______________________________.
7.
What is the hidden mechanism?________________________________________________.
8.
What is the best hope for survival for the rock pocket mouse?_____________________.
9.
How did the mice living on the dark rocks seem to change?________________________.
10.
What technology is now available to help understand how creatures evolve and develop?
_______________________________________________________________________.
11.
How many molecules make up a strand of DNA?___________________________.
What are the letters that are key to the DNA code? ________________________.
What information is carried in DNA? _________________________________________.
14.
What is the substance common to hair, cartilage, and muscles? ___________________.
15.
What is DNA’s other vital quality?___________________________________________.
16.
How can DNA change?____________________________________________________.
17.
What is generated by mutation?_________________
18.
can
When mutations occur in the cells that pass on information to offpspring, what type of change
occur? ___________________________________________________________________.
19.
What did scientists find about the genetic mutation of the pocket mice?
__________________________________________________________
20.
What does that mean for the mice that live on the dark rocks? ______________________.
21.
Other examples of genetic variation have been discovered.
Monkey sees how?_____________________________________________.
Antarctic fish can survive where?__________________________________.
22.
Human genome project
How many ‘letters” of DNA were being sequenced in order? ___________________
23.
Do complex animals (i.e. humans) always have more genes than simper organisms?
Estimate for humans? __________________________
24.
In 2003, what number of genes were discovered in the human genome?_______________
Compare to number in chicken______________.
Compare to number in ear of corn_______________.
25.
Can plants have as many genes as a human?__________________.
26.
What did the study of embroyos reveal about the “building” of different species?
__________________________________________________________________
27.
Body plan genes determine ____________________
Body pattern genes determine____________________
28.
What was discovered about the “paintbrush gene” in fruit flies with and without black wing
spots?
____________________________________________________________
30.
What percent of genetic material contributes to gene coding? _________
31.
What happened when DNA from a spotted fly was transplanted to a fy without spots?
_____________________________________________________________________
32.
Why are “switches” a powerful process within the DNA? _______________________
____________________________________________________________________
33.
How can these switches help explain why a snake embroyo has “legs”?
____________________________________________________________________
Explanation__________________________________________________________
34.
What evolutionary change has occurred in the manatee?_________________________
35.
What feature have lake “sticklebacks” lost compared to ocean varieties?_____________
What mechanism may have controlled this change?_____________________________
36.
What did researchers discover about the gene that makes spikes?______________________
37.
How can the manatee losing its legs be explained? __________________________________
38.
Back to the finches….Finches are born with their distinct beaks already formed.
What did researches look at to determine what causes beaks to vary? _____________________
39.
Researchers discovered that it is the _____________ genes that make the variations among
beaks.
40.
What determines the formation of the beaks? ____________________________________
41.
What role do switches have on “stuck” genes?__
42.
Dinosaurs are believed to be the ancestors of all ______________
Fish are believed to be the ancestors of all ___________________