DB Chapter 8: Zygote cleavages at Hochschule Bonn-Rhein-Sieg

Flashcards and summaries for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg

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Study with flashcards and summaries for the course DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

What are cleavages and what happens there? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

What are the small daughter cells of the zygote after cleavage called? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

Does growth in cytoplasm occur between cleavages? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

Where are the proteins and mRNAs that control cleavages stored? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

How many cell cycle phases do blastomeres have, how many do somatic cells have? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

Which cell cycle phases occur in blastomeres? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

By which factor is the cell cycle regulated? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

When is MPF activated? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

What does MPF consist of? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

How is mitosis activated by MPF? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

What happens with the MPF at the end of mitosis? Which phase is initiated? 

Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

What is the function of synthesis of additional cyclins in later stages? 

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Exemplary flashcards for DB Chapter 8: Zygote cleavages at the Hochschule Bonn-Rhein-Sieg on StudySmarter:

DB Chapter 8: Zygote cleavages

What are cleavages and what happens there? 

Cleavages are a series of relatively fast divisions where the big zygote is divided into smaller daughter cells (blastomeres). 

DB Chapter 8: Zygote cleavages

What are the small daughter cells of the zygote after cleavage called? 

Blastomeres.

DB Chapter 8: Zygote cleavages

Does growth in cytoplasm occur between cleavages? 

No.

DB Chapter 8: Zygote cleavages

Where are the proteins and mRNAs that control cleavages stored? 

In the egg cytoplasm

DB Chapter 8: Zygote cleavages

How many cell cycle phases do blastomeres have, how many do somatic cells have? 

Blastomeres have only 2 phases, while somatic cells have 4 phases.

DB Chapter 8: Zygote cleavages

Which cell cycle phases occur in blastomeres? 

M phase

DB Chapter 8: Zygote cleavages

By which factor is the cell cycle regulated? 

By the mitosis-promoting factor (MPF).

DB Chapter 8: Zygote cleavages

When is MPF activated? 

after fertilisation

DB Chapter 8: Zygote cleavages

What does MPF consist of? 

MPF consist of a cyclin-dependent kinase (cdc2) and a regulatory subunit (cyclin)

DB Chapter 8: Zygote cleavages

How is mitosis activated by MPF? 

During cleavages, cyclinB binds to cdc2, thus activating mitosis. 

DB Chapter 8: Zygote cleavages

What happens with the MPF at the end of mitosis? Which phase is initiated? 

At the end of mitosis, cyclinB is degraded, cdc2 gets inactive and synthesis phase starts. 

DB Chapter 8: Zygote cleavages

What is the function of synthesis of additional cyclins in later stages? 

They can bind and add the gap stages to the cell cycle. 

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