IB Biology Topic D2.2.4 Epigenesis Revision Notes (HL)

IB Biology Topic D2.2.4 Epigenesis Revision Notes (HL) | RevisionDojo

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Epigenesis Is How Genetically Identical Cells Develop Into Different Specialised Cell Types

A multicellular organism develops from a single, undifferentiated cell into an organised system of specialised cells, tissues, and organs.
This gradual building of pattern and complexity during development is called epigenesis.
Every cell in the organism carries the same genome, so differences between cell types cannot come from different DNA sequences.
Instead, cells become specialised because each cell type switches on a different pattern of gene expression.

Differentiation: The Same Genome, Read Differently in Each Cell Type

Definition

Epigenesis

Epigenesis refers to the development of patterns of differentiation in cells, enabling them to perform specific functions.

During development, cells become specialised through differentiation.
Differentiation is guided by epigenetic tags that ensure only the genes needed for a cell's role are expressed.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Epigenesis Is How Genetically Identical Cells Develop Into Different Specialised Cell Types

A multicellular organism develops from a single, undifferentiated cell into an organised system of specialised cells, tissues, and organs.
This gradual building of pattern and complexity during development is called epigenesis.
Every cell in the organism carries the same genome, so differences between cell types cannot come from different DNA sequences.
Instead, cells become specialised because each cell type switches on a different pattern of gene expression.

Differentiation: The Same Genome, Read Differently in Each Cell Type

Definition

Epigenesis

Epigenesis refers to the development of patterns of differentiation in cells, enabling them to perform specific functions.

During development, cells become specialised through differentiation.
Differentiation is guided by epigenetic tags that ensure only the genes needed for a cell's role are expressed.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D2.2.4: Epigenesis Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Epigenesis Is How Genetically Identical Cells Develop Into Different Specialised Cell Types

Differentiation: The Same Genome, Read Differently in Each Cell Type

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Epigenesis Is How Genetically Identical Cells Develop Into Different Specialised Cell Types

Differentiation: The Same Genome, Read Differently in Each Cell Type

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account