Wallaceburg District Secondary School - Science Department 1
I believe that to meet the challenge of the I believe that to meet the challenge of the next century, human beings will have to next century, human beings will have to develop a greater sense of universal develop a greater sense of universal responsibility. Each of us must learn to work responsibility. Each of us must learn to work
not just for his or her own self, family or not just for his or her own self, family or nation, but for the benefit of all mankind.
nation, but for the benefit of all mankind.
His Holiness the Dalai Lama, speech? in 1994 His Holiness the Dalai Lama, speech? in 1994
SBI3U 1.04 Genetic SBI3U 1.04 Genetic
Phylogeny Phylogeny
Wallaceburg District Secondary School - Science Department 2
Just funny Just funny
http://www.kfdunn.com/vector/g_expression.htm
Wallaceburg District Secondary School - Science Department 3
How do we use genetics to How do we use genetics to
infer relationships?
infer relationships?
• • First what are the First what are the – – The tools? The tools?
– – The methods? The methods?
–
– The theories? The theories?
(Merck 2005)
Wallaceburg District Secondary School - Science Department 4
What we need before we can What we need before we can
use genetics use genetics
• • Homology review: similarity due to Homology review: similarity due to common descent
common descent
• • How do we assess homology of DNA How do we assess homology of DNA sequences?
sequences?
• • Levels of homology Levels of homology – – Locus(Location) Locus(Location) – – Allele (branch) Allele (branch) –
– Nucleotide position (order) Nucleotide position (order)
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 5
Example number 1 Example number 1
Wallaceburg District Secondary School - Science Department 6
Things we need to do the Things we need to do the
analysis analysis
http://www- 03.ibm.com/ibm/history/exhib its/vintage/vintage_4506VV1 001.html
Wallaceburg District Secondary School - Science Department 7
Simple Sequence Alignment Simple Sequence Alignment
Taxon 1 GTACGTTG Taxon 2 GTACGTTG Taxon 3 GTACGTTG Taxon 4 GTACATTG Taxon 5 GTACATTG Taxon 6 GTACATTG
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 8
Simple Sequence Alignment Simple Sequence Alignment
Taxon 1 GTACG GTTG Taxon 2 GTACG GTTG Taxon 3 GTACG GTTG Taxon 4 GTACA ATTG Taxon 5 GTACA ATTG Taxon 6 GTACA ATTG
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 9
Simple Sequence Alignment Simple Sequence Alignment
Taxon 1 GTACGTTG Taxon 2 GTACGTTG Taxon 3 GTACGTTG Taxon 4 GTACATTG Taxon 5 GTACATTG Taxon 6 GTACATTG
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 10
DNA Sequence Data Matrix DNA Sequence Data Matrix
G G T T T T A A C C A A T T G G T6 T6
G G T T T T A A C C A A T T G G T5 T5
G G T T T T A A C C A A T T G G T4 T4
G G T T T T G G C C A A T T G G T3 T3
G G T T T T G G C C A A T T G G T2 T2
G G T T T T G G C C A A T T G G T1 T1
C8 C8 C7 C7 C6 C6 C5 C5 C4 C4 C3 C3 C2 C2 C1 C1
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 11
Slightly Less Simple Slightly Less Simple Sequence Alignment Sequence Alignment
Taxon 1 AGAGTGAC Taxon 2 AGAGTGAC Taxon 3 AGAGTGAC Taxon 4 AGAGGAC Taxon 5 AGAGGAC Taxon 6 AGAGGAC
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 12
Slightly Less Simple Slightly Less Simple Sequence Alignment Sequence Alignment
Taxon 1 AGAGT TGAC Taxon 2 AGAGT TGAC Taxon 3 AGAGT TGAC Taxon 4 AGAGGAC Taxon 5 AGAGGAC Taxon 6 AGAGGAC
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 13
Slightly Less Simple Slightly Less Simple Sequence Alignment Sequence Alignment
Taxon 1 AGAGTGAC Taxon 2 AGAGTGAC Taxon 3 AGAGTGAC Taxon 4 AGAG−GAC Taxon 5 AGAG−GAC Taxon 6 AGAG−GAC
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 14
DNA Sequence Data Matrix DNA Sequence Data Matrix
C C A A G G
− − G G A A G G A A T6 T6
C C A A G
− G
− G G A A G G A A T5 T5
C C A A G G
− − G G A A G G A A T4 T4
C C A A G G T T G G A A G G A A T3 T3
C C A A G G T T G G A A G G A A T2 T2
C C A A G G T T G G A A G G A A T1 T1
C8 C8 C7 C7 C6 C6 C5 C5 C4 C4 C3 C3 C2 C2 C1 C1
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 15
Alignment Gaps Alignment Gaps
• • Gaps are inserted to maximize Gaps are inserted to maximize homology across nucleotide positions homology across nucleotide positions
• • Gaps are hypothesized indels Gaps are hypothesized indels
•
• Inserting a gap assumes that an indel Inserting a gap assumes that an indel event is a better explanation of the event is a better explanation of the differences among sequences than differences among sequences than nucleotide substitution
nucleotide substitution
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 16
AGAGTGAC AGAGTGAC AGAGTGAC AGAG−GAC AGAG−GAC AGAG−GAC Taxon 1 AGAGTGAC
Taxon 2 AGAGTGAC Taxon 3 AGAGTGAC Taxon 4 AGAGGAC Taxon 5 AGAGGAC Taxon 6 AGAGGAC
3 substitutions 0 indels
0 substitutions 1 indels
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 17
Ambiguous Alignment with a Ambiguous Alignment with a
Single
Single- -Base Base Indel Indel
Taxon 1 GGTCAG Taxon 2 GGCCAA Taxon 3 AGCTAA Taxon 4 AGCAA Taxon 5 AGCAA Taxon 6 AGCAA
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 18
Ambiguous Alignment with a Ambiguous Alignment with a
Single
Single- -Base Base Indel Indel
Taxon 1 GGTCAG Taxon 2 GGCCAA Taxon 3 AGCTAA Taxon 4 AGCAA Taxon 5 AGCAA Taxon 6 AGCAA
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 19
Ambiguous Alignment with a Ambiguous Alignment with a
Single
Single- -Base Base Indel Indel
Taxon 1 GGTCAG GGTCAG Taxon 2 GGCCAA GGCCAA Taxon 3 AGCTAA AGCTAA Taxon 4 AG−CAA AGC−AA Taxon 5 AG−CAA AGC−AA Taxon 6 AG−CAA AGC−AA
4 substitutions 1 indels
4 substitutions
1 indels
FishbeinFishbein, M. (2003a)., M. (2003a).Wallaceburg District Secondary School - Science Department 20
More Ambiguous Alignment More Ambiguous Alignment
with a Single
with a Single- -Base Base Indel Indel
Taxon 1 AAGGTT Taxon 2 AAGGTT Taxon 3 AAGAT Taxon 4 AACGTT Taxon 5 AACGTT Taxon 6 AACGTT
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 21
More Ambiguous Alignment More Ambiguous Alignment
with a Single
with a Single- -Base Base Indel Indel
Taxon 1 AAGGTT Taxon 2 AAGGTT Taxon 3 AAGAT Taxon 4 AACGTT Taxon 5 AACGTT Taxon 6 AACGTT
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 22
A More Ambiguous Alignment A More Ambiguous Alignment
T 1 AAG−GTT AAG−GTT AAG−GTT T 2 AAG−GTT AAG−GTT AAG−GTT T 3 AAGA−−T AAG−A−T AAGA−−T T 4 AAC−GTT AA−CGTT AA−CGTT T 5 AAC−GTT AA−CGTT AA−CGTT T 6 AAC−GTT AA−CGTT AA−CGTT
1 substitution 2 indels (1 bp, 2bp)
1 substitution 3 indels (1bp, 1bp, 1bp)
1 substitution 3 indels (1 bp, 1 bp, 2bp)
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 23
Here is an example (#2) of Here is an example (#2) of how it is done (simply put) how it is done (simply put)
Wallaceburg District Secondary School - Science Department 24
Example Example
Taxon 1 GTAA G-GTTTT G Taxon 2 GTAA G-GTTTT G Taxon 3 GTAA GA--TTTG Taxon 4 GTAA C -GTTTT G Taxon 5 GT--- TTG Taxon 6 GT--- TTG Taxon 7 GT--- TTG Taxon 8 GTA--- TTG Taxon 9 GTAA C -GTTTT G
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 25
Delimit Ambiguous Region Delimit Ambiguous Region
Taxon 1 G TAA G-GTTTT G Taxon 2 G TAA G-GTTTT G Taxon 3 G TAA GA--TTT G Taxon 4 G TAA C -GTTTT G Taxon 5 G T--- TTG Taxon 6 G T--- TTG Taxon 7 G T--- TTG Taxon 8 G TA--- TTG Taxon 9 G TAA C -GTTTT G
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 26
Delimit Ambiguous Region Delimit Ambiguous Region
Taxon 1 AA G-GTT Taxon 2 AA G-GTT Taxon 3 AA GA--T Taxon 4 AAC-GTT Taxon 5 --- Taxon 6 --- Taxon 7 --- Taxon 8 A --- Taxon 9 AAC-GTT
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 27
Remove Gaps Remove Gaps
Taxon 1 AA G GTT Taxon 2 AA G GTT Taxon 3 AA GAT Taxon 4 AAC GTT Taxon 5
Taxon 6 Taxon 7
Taxon 8 A
Taxon 9 AAC GTT
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 28
Recode Ambiguous Region Recode Ambiguous Region
State Taxon 1 AAG G TT 0 Taxon 2 AAG G TT 0 Taxon 3 AAG AT 1 Taxon 4 AAC GTT 2
Taxon 5 3
Taxon 6 3
Taxon 7 3
Taxon 8 A 4
Taxon 9 AAC GTT 2
FishbeinFishbein, M. (2003a)., M. (2003a).Wallaceburg District Secondary School - Science Department 29
Recoded Matrix Recoded Matrix
Taxon 1 GTAA G-GTTTTG 0 Taxon 2 GTAA G-GTTTTG 0 Taxon 3 GTAA G A--TTT G 1 Taxon 4 GTAA C-GTTTT G 2 Taxon 5 GT--- TTG 3 Taxon 6 GT--- TTG 3 Taxon 7 GT--- TTG 3 Taxon 8 GTA---TTG 4 Taxon 9 GTAA C-GTTTT G 2
Fishbein Fishbein, M. (2003a)., M. (2003a).
Wallaceburg District Secondary School - Science Department 30
Recoded Matrix Recoded Matrix
Taxon 1 GTTTG 0
Taxon 2 GTTTG 0
Taxon 3 GTTTG 1
Taxon 4 GTTTG 2
Taxon 5 GTTTG 3
Taxon 6 GTTTG 3
Taxon 7 GTTTG 3
Taxon 8 GTTTG 4
Taxon 9 GTTTG 2
Wallaceburg District Secondary School - Science Department 31
Questions?
Questions?
I hope so!
I hope so!
Wallaceburg District Secondary School - Science Department 32
Here is a genetic trait moving Here is a genetic trait moving through selective breeding of through selective breeding of
a plant a plant
From Judd et al. (2002), Plant Systematics
Wallaceburg District Secondary School - Science Department 33
SO how does this help SO how does this help
•
• There are some major problems There are some major problems
– – Gene expression does not necessarily confer Gene expression does not necessarily confer with morphological data
with morphological data
– – Methodologies are still being developed Methodologies are still being developed – – Huge holes in information Huge holes in information
–
– Are we even right? Are we even right?
Wallaceburg District Secondary School - Science Department 34
Wallaceburg District Secondary School - Science Department 35
Wallaceburg District Secondary School - Science Department 36
Wallaceburg District Secondary School - Science Department 37
Wallaceburg District Secondary School - Science Department 38
Knowledge links Knowledge links
Wallaceburg District Secondary School - Science Department 39
Overview
Overview
Wallaceburg District Secondary School - Science Department 40
References References
•
• FishbeinFishbein, M. (2003a). Retrieved Aug. 09, 2005, from http://www2., M. (2003a). Retrieved Aug. 09, 2005, from http://www2.msstatemsstate..eduedu/~zg3/docs/S03_Lecture09./~zg3/docs/S03_Lecture09.pptpptWeb site: Web site:
http://www2.
http://www2.msstatemsstate..eduedu/~zg3/docs/S03_Lecture09./~zg3/docs/S03_Lecture09.pptppt. .
•• Judd et al. (2002), Plant Judd et al. (2002), Plant SystematicsSystematics
•
• Merck and Company, (2005). Retrieved Aug. 09, 2005, fromMerck and Company, (2005). Retrieved Aug. 09, 2005, fromTHeTHeMerck Manual The second home edition Web site: Merck Manual The second home edition Web site:
http://www.
http://www.merckmerck.com/.com/mmhemmhe/sec01/ch002/ch002a.html/sec01/ch002/ch002a.html
Wallaceburg District Secondary School - Science Department 41