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Definition
| rapid succession of cell divisions that produces a ball of cells (multicellular embryo) from the embryo |
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| fluid-filled cavity created during cleavage that forms the center of the embryo |
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| hollow ball of cells created by cleavage |
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Definition
| second major phase of embryonic development, which is when cells take up new locations that will allow later formation of organs and tissues |
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Definition
| three layered embryonic stage |
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| outer layer produced during gastrulation, forms the outer layer skin of gastrula. |
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Definition
| forms embryonic digestive tract |
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Definition
| partly fills the space between the ectoderm and endoderm, creates skeletal, muscular, circulatory, and reproductive systems |
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Definition
| extends for most of the embryo's length and provides support for other developing tissues |
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Definition
| a tube of ectoderm that becomes the brain and spinal cord |
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| the mechanism by which one group of cells influences the development of an adjacent group of cells |
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Term
| programmed cell death/apoptosis |
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Definition
| timely and tidy suicide of cells |
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Definition
| shaping of an animals major body parts |
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Definition
| class of similar genes that help direct embryonic pattern in a wide variety of organisms |
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| nucleotide sequence that is translated into a segment of the protein product of the homeotic gene |
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Definition
| pregnancy, or the carrying of developing young within the female reproductive tract |
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Definition
| time period from last menstration till baby is born |
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Definition
| hollow sphere of cells formed by the embryo |
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Definition
| outer layer of cells that covers the blastocyst |
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