26 Questions
What is spiral and determinate cleavage?
Spiral and determinate cleavage is when the lines or planes of cleavage are not symmetrical between poles.
What characterizes spiral and determinate cleavage?
Spiral and determinate cleavage is characterized by asymmetrical lines or planes of cleavage between poles.
How are lines or planes of cleavage in spiral and determinate cleavage described?
In spiral and determinate cleavage, the lines or planes of cleavage are described as not symmetrical between poles.
In spiral and determinate cleavage, how are the lines or planes of cleavage oriented?
Diagonal to the polar axis
What is the outcome of spiral and determinate cleavage on the cells around the axis of polarity?
Unequal cells are produced
What is the significance of blastomeres in spiral and determinate cleavage?
Each blastomere has a determined role in embryo formation
Match the following cleavage types with their characteristics:
Spiral and determinate cleavage = Diagonal cleavage producing unequal cells around the axis of polarity Radial and indeterminate cleavage = Symmetrical cleavage producing equal cells around the axis of polarity Blastomeres in spiral and determinate cleavage = Each blastomere has a determined role in embryo formation Fate of blastomeres in radial and indeterminate cleavage = The fate of each blastomere is not predetermined
In spiral and determinate cleavage, how are the lines or planes of cleavage oriented?
Diagonal to the polar axis
What is the outcome of spiral and determinate cleavage on the cells around the axis of polarity?
Unequal cells around the axis of polarity
What characterizes blastomeres in spiral and determinate cleavage?
Each blastomere has a determined role in the formation of the embryo
Match the following cleavage types with their descriptions:
Spiral and determinate cleavage = Diagonal lines or planes of cleavage, unequal cells around the axis of polarity, blastomeres have predetermined roles Radial and indeterminate cleavage = Symmetrical lines or planes of cleavage, equal cells around the axis of polarity, blastomeres have undetermined roles Bilateral cleavage = Vertical lines or planes of cleavage, mirror-image halves, blastomeres have predetermined roles Rotational cleavage = Multiple planes of cleavage at right angles, blastomeres have undetermined roles, equal cells around the axis of polarity
True or false: In spiral and determinate cleavage, the lines or planes of cleavage are symmetrical between poles
False
True or false: In spiral and determinate cleavage, blastomeres have an undetermined role to play in the formation of the embryo
False
True or false: In spiral and determinate cleavage, the fate of each blastomere is not foretold
False
True or false: In spiral and determinate cleavage, the lines or planes of cleavage are symmetrical between poles?
False
True or false: In spiral and determinate cleavage, blastomeres have an undetermined role to play in the formation of the embryo?
False
True or false: In spiral and determinate cleavage, the fate of each blastomere is foretold?
True
Lines or planes of cleavage in spiral and determinate cleavage are not ______ between poles
symmetrical
The fate of each blastomere in spiral and determinate cleavage is ______
foretold
In spiral and determinate cleavage, blastomeres have ______ role to play in the formation of the embryo
determined
What characterizes blastomeres in spiral and determinate cleavage?
The blastomeres in spiral and determinate cleavage have a determined role to play in the formation of the embryo.
What is the outcome of spiral and determinate cleavage on the cells around the axis of polarity?
Spiral and determinate cleavage produces unequal cells around the axis of polarity.
What is the significance of blastomeres in spiral and determinate cleavage?
The fate of each blastomere is foretold in spiral and determinate cleavage.
What characterizes blastomeres in spiral and determinate cleavage?
They have determined roles to play in the formation of the embryo
How are the lines or planes of cleavage oriented in spiral and determinate cleavage?
Diagonal to the polar axis
What is the fate of each blastomere in spiral and determinate cleavage?
Foretold
Study Notes
Spiral and Determinate Cleavage
- Spiral and determinate cleavage is characterized by asymmetrical lines or planes of cleavage.
- Cleavage lines are diagonal to the polar axis, resulting in unequal cells around the axis of polarity.
- All blastomeres in spiral and determinate cleavage have predetermined roles in embryo formation.
- The fate of each blastomere is predetermined in this type of cleavage.
- This type of cleavage contrasts with radial and indeterminate cleavage.
- It is a characteristic feature of certain groups of organisms, such as mollusks and annelids.
- Spiral and determinate cleavage leads to the formation of specific tissues and structures during embryonic development.
- This type of cleavage is essential for the differentiation and specialization of cells.
- The unequal distribution of cytoplasm within blastomeres plays a crucial role in determining cell fate.
- The diagonal cleavage pattern ensures the development of distinct cell lineages.
- Spiral and determinate cleavage plays a fundamental role in the early stages of embryogenesis.
- Understanding this type of cleavage is important for studying the developmental biology of various organisms.
Test your knowledge of embryology with this quiz on spiral and determinate cleavage. Explore the differences in cleavage patterns and their implications for development.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
