Match each developmental stage with its description....

Match each developmental stage with its description. __________cleavage __________gamete formation __________organ formation __________cell differentiation __________gastrulation __________fertilization a. egg and sperm mature in parents b. sperm, egg nuclei fuse c. germ layers form d. zygote becomes a ball of cells called a morula e. cells come to have specific structures and functions f. starts when germ layers split into subgroups of cells

Match each developmental stage with its description.
__________cleavage
__________gamete formation
__________organ formation
__________cell differentiation
__________gastrulation
__________fertilization
a. egg and sperm mature in parents
b. sperm, egg nuclei fuse
c. germ layers form
d. zygote becomes a ball of cells called a morula
e. cells come to have specific structures and functions
f. starts when germ layers split into subgroups of cells

Key Concepts

Organ Formation

Also known as organogenesis, this phase involves the development and organization of cells into specific organs. It follows the processes of gastrulation and cell differentiation as tissues are arranged into functional structures within the body.

Cell Differentiation

The process through which unspecialized cells become specialized by acquiring distinct structures and functions. This stage is essential for the formation of varied tissues and ultimately the organs of a developing organism.

Gastrulation

A crucial developmental process where the early embryo reorganizes into multiple germ layers. Each of these layers—ectoderm, mesoderm, and endoderm—gives rise to different tissues and organ systems in the body.

Cleavage

A series of rapid mitotic divisions that the zygote undergoes immediately after fertilization. These divisions produce a multicellular structure called a morula, setting the foundation for later embryonic development.

Fertilization

The union of a sperm and an egg, resulting in the fusion of their nuclei to form a zygote. This event marks the beginning of a new organism’s development by combining genetic material from both parents.

Gamete Formation

The process by which germ cells develop into mature gametes, such as sperm and eggs, within the parental organisms. This stage ensures that the genetic material is properly prepared and packaged for reproduction.

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