CREATING
PHYLOGENETIC TREE
CRITERIA2025 LATEST
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homologous sequences.
Before you can compare sequences, you need to make
sure that you are comparing stretches of DNA that are
evolutionary related-i.e., or
Species Relationships Based On Anatomical Relationships
Scientists classify species based on shared features. The
more features that are shared, the more likely the species
are to be closely related in evolution
Anatomy
allows physical trait comparisons, but does not allow
genetic comparisons.
Molecular sequences (DNA, RNA, protein)
can also be compared to study relationships
anatomical comparison
we look for similarities and difference to deduce
relationships
sequence comparison
, can be more objective and less ambiguous than
anatomical comparison.
Species Relationships Based On Sequence Similarity
Molecular sequences (DNA, RNA, protein) can also be
compared to study relationships
sequence
we can view everything as ________ because now we have
the possibility of literally sequencing everything.
Evolutionary related organisms
share a common ancestor with an ancestral DNA sequence
mutations
As organisms evolve and diverge, their DNA sequences
accumulate differences, also known as ----
SNPs and Indels
Two common types of mutations are called _________
Sequence Differences And Evolutionary Relationships
Evolutionary related organisms share a common ancestor
with an ancestral DNA sequence
single nucleotide polymorphism
One common type of mutation that can be used to track
common ancestry is the ______ (SNP)
insertions and deletions, or "Indels"
These are mutations in which one or more nucleotide pairs
in a DNA strand is lost or gained.
More distantly related species
have had more time elapse since they shared a common
ancestor; therefore, they have has more time for
mutations to accumulate in their DNA
PHYLOGENETIC TREE
CRITERIA2025 LATEST
UPDATE(DOWNLOAD
TO PASS)
homologous sequences.
Before you can compare sequences, you need to make
sure that you are comparing stretches of DNA that are
evolutionary related-i.e., or
Species Relationships Based On Anatomical Relationships
Scientists classify species based on shared features. The
more features that are shared, the more likely the species
are to be closely related in evolution
Anatomy
allows physical trait comparisons, but does not allow
genetic comparisons.
Molecular sequences (DNA, RNA, protein)
can also be compared to study relationships
anatomical comparison
we look for similarities and difference to deduce
relationships
sequence comparison
, can be more objective and less ambiguous than
anatomical comparison.
Species Relationships Based On Sequence Similarity
Molecular sequences (DNA, RNA, protein) can also be
compared to study relationships
sequence
we can view everything as ________ because now we have
the possibility of literally sequencing everything.
Evolutionary related organisms
share a common ancestor with an ancestral DNA sequence
mutations
As organisms evolve and diverge, their DNA sequences
accumulate differences, also known as ----
SNPs and Indels
Two common types of mutations are called _________
Sequence Differences And Evolutionary Relationships
Evolutionary related organisms share a common ancestor
with an ancestral DNA sequence
single nucleotide polymorphism
One common type of mutation that can be used to track
common ancestry is the ______ (SNP)
insertions and deletions, or "Indels"
These are mutations in which one or more nucleotide pairs
in a DNA strand is lost or gained.
More distantly related species
have had more time elapse since they shared a common
ancestor; therefore, they have has more time for
mutations to accumulate in their DNA
