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Human vs.________ # of differences in the amino acid sequence
Rhesus monkey
1
Horse
3
Donkey
3
Common zebra
3
Pig, cow, sheep
3
Dog
3
Gray whale
3
Rabbit
3
Kangaroo
3
Chicken, turkey
3
Penguin
3
Pekin duck
2
Snapping turtle
3
Rattlesnake
3
Bullfrog
3
Tuna
6
Screwfly fly
5
Silkworm moth
12
Tomato horn worm 13
Wheat
18
Rice
17
Baker’s Yeast
15
Candida Yeast
17
Neurospora
18
Reflection Questions:
Summarize your amino acid comparison in paragraph form. To guide your summary, reflect on
the following questions.
1. What does it mean when scientists say that living organisms share a universal genetic
code? It means that each living organism has a genetic code
2. How does a universal genetic code relate to the hypotheses about the origin of life on
Earth?it is shared by all life forms on earth
3. How are self-replicating molecules, such as RNA molecules in the “RNA World”
hypothesis, essential to the most popular hypotheses about the origin of life on Earth?
Rna can store genetic information and they also reproduce
4.How might similarities and differences in genetic codes, or the proteins built as a result of
these codes, be used to determine how closely related different species are? The more similar the
sequences the more recent. The more recent the most recent common ancestor was, the more
related the two different species are.
5.Based on the amino acid sequence data for the Cytochome-C protein, chimpanzees
and humans share an identical coding sequence. What other species identified on the
chart has a coding sequence that is most closely related. rhesus monkey and pekin duck