Jan 30, 2010

Today in Class We…

l Turned in Page 5, web questions

l Checked in answers for UP p. 13~16 (Lab 26)

l Lab: Biochemical Evidence for Evolution

Homework…

l Bring calculator

l Finish UP p.17A~17F

UP p. 13~16 Selective Answers

2. Hemoglobin is: protein, composed of amino acids, chemical molecule.

http://www.google.com/imgres?imgurl=http://upload.wikimedia.org/wikipedia/commons/b/ba/Hemoglobin_t-r_state_ani.gif&imgrefurl=http://en.wikipedia.org/wiki/Hemoglobin&usg=__Ccy5A1KgKpqDEWQlaYPAcjpvNKE=&h=301&w=400&sz=88&hl=en&start=2&zoom=1&tbnid=cSB9XihU58jC4M:&tbnh=93&tbnw=124&ei=QFonT_y8KMbk0QGB9_TxAg&um=1&itbs=1

5. The hemoglobin is

a) very similar between human and gorilla

b) not very similar between human and horse

c) not very similar between gorilla and horse

7. a)The chemical makeups of human and gorilla hemoglobin are very similar.

b)The chemical makeups of human and horse hemoglobin are not very similar.

c)The chemical makeups of gorilla and horse hemoglobin are not similar.

9. The base sequence of DNA is most similar between human and gorillas.

Biochemical Evidence for Evolution Lab

In this lab we:

l Learned about homologous structures

Determined which animal’s more related to human (chimpanzee, monkey, cow or frog?)

Materials

l 5 testing well trays

l 1 vial simulated human antiserum

l 10 stirring picks

l 7 plastic dropping pipettes

l 1 wax pencil

l paper towel

l 1 vial of simulated human serum

l 1 vial of simulated cow serum

l 1 vial of simulated chimpanzee serum

l 1 vial of simulated frog serum

l 1 vial of simulated monkey serum

l water

Procedure

1. Take one tray, label the animals and the wells 1~8.

2. In each well, place the corresponding serum as add in water in proportion as shown in chart

Well number	Drops of serum	Drops of water
1	8	0
2	7	1
3	6	2
4	5	3
5	4	4
6	3	5
7	2	6
8	1	7

3. shake the trays to mix the serums and water thoroughly

4. wait for 5 minutes to see the result

5. Record agglutination of each well in the data table

6. Repeat for all other serums

7. Rinse and dry all materials thoroughly.

Data Table

Use the following notations:

+++ heavy agglutination

++ medium agglutination

+ slight agglutination

_ No reaction

Organism	1	2	3	4	5	6	7	8
Human
Cow
Chimp
Frog
Monkey

Thank you all and have a nice day!

Next Scribe: ***Sophia***