This white mark will be perfectly round if the egg is fertile (called a blastoderm).    From Wordnik.com.  [TreeHugger] Reference

Blastodermic cells: are those forming the blastoderm.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

Blastem: a nucleated protoplasmic layer preceding the blastoderm.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

According to his account the cells of the blastoderm are formed actually in the ovum.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

His thesis project on the origin of imaginal disc cells in the blastoderm interested me very much.    From Wordnik.com.  [Christiane Nüsslein-Volhard - Autobiography] Reference

Schardin, we did a fate map for the larval cuticle using laser ablations of Drosophila blastoderm cells.    From Wordnik.com.  [Christiane Nüsslein-Volhard - Autobiography] Reference

The relation between the unfertilised egg and the blastoderm which arises from it is not made altogether clear by Schwann.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

The syncytial blastoderm in Drosophila show that the nuclei can independently divide and later form a multicellular embryo.    From Wordnik.com.  [Albert de Roos: A design hypothesis for the evolution of the nucleus] Reference

Both studies suggested that segmental units might be established as three to four cell wide stripes at the blastoderm stage.    From Wordnik.com.  [Eric F. Wieschaus - Autobiography] Reference

Endoderm: the inner layer of the blastoderm in the embryo, giving origin to the mid-intestine and other visceral organs: see entoderm.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

This experiment was important in showing that the primordia of individual segments in the blastoderm stage were no more than three cells wide.    From Wordnik.com.  [Christiane Nüsslein-Volhard - Autobiography] Reference

Schwann's next step is a detailed demonstration of the origin of each tissue from simple cells such as those composing the incubated blastoderm.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

When the egg leaves the ovary the nucleus disappears, leaving behind it this rudiment of the blastoderm, which rapidly grows and increases in size.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

For my first experiments in his lab, I set out to investigate whether cells at the blastoderm stage were already determined to form specific discs.    From Wordnik.com.  [Eric F. Wieschaus - Autobiography] Reference

Ectoderm: the outer layer of skin: the outer layer of the blastoderm, giving rise to the nervous system and to epithelial structures of the body surface.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

A period of rapid synchronous cleavages results in a three-dimensional mass of cells, unlike the two-dimensional blastoderm formed in the Drosophila embryo.    From Wordnik.com.  [Nobel Lecture The Identification Of Genes Controlling Development In Flies And Fishes] Reference

My plan was to remove single cells from defined regions of the blastoderm and culture them in adult abdomens surrounded by genetically marked "feeder cells.".    From Wordnik.com.  [Eric F. Wieschaus - Autobiography] Reference

Because legs were derived from different segments, my results suggested that if blastoderm cells were determined for anything, they were determined for segments rather than discs.    From Wordnik.com.  [Eric F. Wieschaus - Autobiography] Reference

The first of these differentiations in time is the formation of the germ-layers, which takes place by a splitting or separation of the blastoderm into a series of superimposed lamellæ.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

This larval skin is derived from a large portion of the embryonic fate map, while the remainder of the blastoderm largely gives rise to internal organs which are less visible in the living embryo.    From Wordnik.com.  [Nobel Lecture The Identification Of Genes Controlling Development In Flies And Fishes] Reference

Even before the publication of von Baer's book he had interpreted in terms of the germ-layer theory sketched by his friend Pander the splitting of the blastoderm which occurs in the early development of.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

Elsewhere in the blastoderm they are distinctly separate.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

The section below is a small portion of the blastodermic area. b.d., blastoderm.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

"Are you full awake now, ye red-hot blastoderm?" gasped Graham, struggling to free himself when Gallagher gave him leave.    From Wordnik.com.  [Empire Builders] Reference

Let the Creator say, if you like, 'I will establish an antipathetic symbiosis between thee and the female, and between thy blastoderm and her blastoderm.'.    From Wordnik.com.  [Back to Methuselah] Reference

The blastoderm now consists of three layers, named from without inward: ectoderm, mesoderm, and entoderm; each has distinctive characteristics and gives rise to certain tissues of the body.    From Wordnik.com.  [I. Embryology. 5. Segmentation of the Fertilized Ovum] Reference

This stage is shown in section in the lower figure of Figure 1. b.d., the blastoderm, is from this point of view, a part of the ripped and flattened blastosphere, spread out on the yolk; s.c. is the segmentation cavity, and y. the yolk.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

Y., the undivided yolk. s.c., the segmentation between the blastoderm and yolk.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

A simple experiment the theory of Roux and Weismann that, when the embryo of the frog is in the two-cell stage, the blastomeres receive unequal contributions from the parent blastoderm, so that.    From Wordnik.com.  [Thomas H. Morgan - Biography] Reference

(blastoderm) and "Keimblatt" (germ-layer).    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference