Origin of new gene via gene duplication Function A Gene Z ab Gene Z Function B Gene duplication Function A Genes Z, and Z, are initially identical to gene Z. Gene Z, Z, ab Function B Z, Function A ab Gene Z, Function B 2 Subfunctionalization 3 Neofunctionalization Pseudogene Function ab z, z, X z, Gene Z, Gene Z, → Function A ak Z, ab Function A Z, Z, Gene Z, → Function c ab Gene Z, → Function B Inactivating Gene Z, retains the original function of gene Z, while gene Z, acquires a new function. The composite functions of genes Z, and Z, are equivalent to those of gene z. mutations ab z, z, X ab Function A Gene Z, Function B 2015 Pearson Eduoalion, Ino. Majority of new genes Gene duplication Derivation of exons from transposable elements (TE) TE Duplication I Divergence New splice sites evolve within TE Gene duplication by unequal crossover Other TE sequences degenerate Lateral gene transfer Organism A | Transfer Exon shuffling Organism B | Diverge Organism B Gene fission/ fusion Fusion t Fission Reverse transcription | Transcription De novo derivation from noncoding sequence Reverse transcription and insertion © 2019 Pearson Education, Inc. 2019 Pearson Education, Inc.
Origin of new gene via gene duplication Function A Gene Z ab Gene Z Function B Gene duplication Function A Genes Z, and Z, are initially identical to gene Z. Gene Z, Z, ab Function B Z, Function A ab Gene Z, Function B 2 Subfunctionalization 3 Neofunctionalization Pseudogene Function ab z, z, X z, Gene Z, Gene Z, → Function A ak Z, ab Function A Z, Z, Gene Z, → Function c ab Gene Z, → Function B Inactivating Gene Z, retains the original function of gene Z, while gene Z, acquires a new function. The composite functions of genes Z, and Z, are equivalent to those of gene z. mutations ab z, z, X ab Function A Gene Z, Function B 2015 Pearson Eduoalion, Ino. Majority of new genes Gene duplication Derivation of exons from transposable elements (TE) TE Duplication I Divergence New splice sites evolve within TE Gene duplication by unequal crossover Other TE sequences degenerate Lateral gene transfer Organism A | Transfer Exon shuffling Organism B | Diverge Organism B Gene fission/ fusion Fusion t Fission Reverse transcription | Transcription De novo derivation from noncoding sequence Reverse transcription and insertion © 2019 Pearson Education, Inc. 2019 Pearson Education, Inc.
Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN:9781305073951
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter26: Human Evolution
Section: Chapter Questions
Problem 1DAA: Neanderthal Hair Color The MC1R gene regulates pigmentation in humans (Sections 14.1 and 15.1...
Related questions
Question
How do these 2 diagrams fit within the scope of evolutionary genomics?
Transcribed Image Text:Origin of new gene
via gene duplication
Function A
Gene Z
ab
Gene Z
Function B
Gene duplication
Function A
Genes Z, and Z, are
initially identical to
gene Z.
Gene Z,
Z,
ab
Function B
Z,
Function A
ab
Gene Z,
Function B
2 Subfunctionalization
3 Neofunctionalization
Pseudogene
Function
ab z,
z, X
z,
Gene Z,
Gene Z, → Function A
ak
Z,
ab
Function A
Z,
Z,
Gene Z, → Function c
ab
Gene Z, → Function B
Inactivating
Gene Z, retains the
original function of
gene Z, while gene Z,
acquires a new function.
The composite
functions of genes Z,
and Z, are equivalent
to those of gene z.
mutations
ab z,
z, X
ab
Function A
Gene Z,
Function B
2015 Pearson Eduoalion, Ino.
Transcribed Image Text:Majority of new genes
Gene duplication
Derivation of
exons from
transposable
elements (TE)
TE
Duplication
I Divergence
New splice sites
evolve within TE
Gene duplication by
unequal crossover
Other TE sequences
degenerate
Lateral gene
transfer
Organism A
| Transfer
Exon shuffling
Organism B
| Diverge
Organism B
Gene fission/
fusion
Fusion t Fission
Reverse
transcription
| Transcription
De novo derivation
from noncoding
sequence
Reverse transcription
and insertion
© 2019 Pearson Education, Inc.
2019 Pearson Education, Inc.
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