In the early stages of vertebrate development, the process of cleavage yields successive blastomeres. How are these blastomeres described?Multiple choice question.They grow larger and larger.They begin cellular differentiation immediately.They become smaller and smaller.They are about the same size as the original zygote.
Question
In the early stages of vertebrate development, the process of cleavage yields successive blastomeres. How are these blastomeres described?Multiple choice question.They grow larger and larger.They begin cellular differentiation immediately.They become smaller and smaller.They are about the same size as the original zygote.
Solution
The correct answer is: They become smaller and smaller.
Here's why:
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The process of cleavage in early vertebrate development is a series of rapid cell divisions without cell growth.
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The zygote first divides into two cells, then four, then eight, and so on.
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As the number of cells (blastomeres) increases, the size of each individual cell decreases.
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Therefore, the blastomeres become smaller and smaller, not larger.
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Cellular differentiation, the process by which a cell changes from one cell type to another, typically occurs later in development.
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The size of the blastomeres is not about the same size as the original zygote because the zygote divides into smaller cells during cleavage.
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In sexual reproductiona) a zygote is formed from the fusion of an egg and sperm.b) an embryo is formed from the fusion of egg and sperm.c) a zygote is formed from an egg from a male and an egg from a female.d) an offspring is formed that is identical to one of the parents
Which are true statements regarding cleavage and the blastula?Check All That ApplyCleavage is the division of a zygote into smaller and smaller cells.Cleavage is the division of a zygote into smaller and smaller cells.The blastula is a solid ball of cells.The blastula is a solid ball of cells.Cleavage generally occurs slowly.Cleavage generally occurs slowly.Cleavage patterns are identical among different animal species.Cleavage patterns are identical among different animal species.The presence of yolk may impede cleavage.
What is the developing structure called when the zygote divides and forms groups that develop into different tissues and organs?
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