Location and behavior of dorsal determinants during
... region in combination with cortical rotation. Little is known, however, about how cortical rotation is involved in the displacement of the determinants or in what manner the determinants are displaced, i.e. whether they are displaced straightly from the vegetal pole to the dorsal region, keeping the ...
... region in combination with cortical rotation. Little is known, however, about how cortical rotation is involved in the displacement of the determinants or in what manner the determinants are displaced, i.e. whether they are displaced straightly from the vegetal pole to the dorsal region, keeping the ...
Fertilization - Formatted
... open sea, where they are readily dispersed. For this reason, a large number of gametes may be produced to maintain a sufficient gamete concentration in the water. Moreover, the aquatic medium is shared by other species that may shed their gametes at the same time. In aquatic medium the movement of s ...
... open sea, where they are readily dispersed. For this reason, a large number of gametes may be produced to maintain a sufficient gamete concentration in the water. Moreover, the aquatic medium is shared by other species that may shed their gametes at the same time. In aquatic medium the movement of s ...
Influence of Body Size and Population Density on
... The finding that male size had no effect on fertilization can be related to the distribution of sperm sources. Sperm dilutes quickly over the two-dimensional area inhabited by urchins as it disperses through the three-dimensional volume of water. The number and position of sperm sources may be more ...
... The finding that male size had no effect on fertilization can be related to the distribution of sperm sources. Sperm dilutes quickly over the two-dimensional area inhabited by urchins as it disperses through the three-dimensional volume of water. The number and position of sperm sources may be more ...
197 THE ROLE OF Ca2+ IN SIGNAL TRANSDUCTION FOLLOWING
... in Fucus serratus thus appears to have a much broader and fundamental developmental significance than the cortical reaction in animal eggs. Metabolic and molecular changes and Fucus serratus egg activation Fertilization in Fucus serratus is also accompanied by a series of biochemical events. Metabol ...
... in Fucus serratus thus appears to have a much broader and fundamental developmental significance than the cortical reaction in animal eggs. Metabolic and molecular changes and Fucus serratus egg activation Fertilization in Fucus serratus is also accompanied by a series of biochemical events. Metabol ...
developmental biology 5 fertilization Introduction: Special features of
... amino acids and monosaccharides of fertilizin vary from one species to another so that each species possesses its specific type of fertilizin. Each molecule of fertilizin has more than one ‘active group’ so that one fertilizin particle may attach to two or more sperms and bind them together. The rec ...
... amino acids and monosaccharides of fertilizin vary from one species to another so that each species possesses its specific type of fertilizin. Each molecule of fertilizin has more than one ‘active group’ so that one fertilizin particle may attach to two or more sperms and bind them together. The rec ...
DEVELOPMENTAL BIOLOGY 5 FERTILIZATION
... amino acids and monosaccharides of fertilizin vary from one species to another so that each species possesses its specific type of fertilizin. Each molecule of fertilizin has more than one ‘active group’ so that one fertilizin particle may attach to two or more sperms and bind them together. The rec ...
... amino acids and monosaccharides of fertilizin vary from one species to another so that each species possesses its specific type of fertilizin. Each molecule of fertilizin has more than one ‘active group’ so that one fertilizin particle may attach to two or more sperms and bind them together. The rec ...
Miquela Research Poster Final
... Zebrafish (Danio rerio) are freshwater teleost, often found in home aquariums and kept at 28.5°C (Nesan et al. 2012) and between 6.8 and 7.2 pH. Not only can they produce many embryos in a short amount of time, the amount of time between fertilization and hatching is between three and six days, and ...
... Zebrafish (Danio rerio) are freshwater teleost, often found in home aquariums and kept at 28.5°C (Nesan et al. 2012) and between 6.8 and 7.2 pH. Not only can they produce many embryos in a short amount of time, the amount of time between fertilization and hatching is between three and six days, and ...
The Program of and Mechanisms of Fertilization in the Echinoderm
... process (Tilney et al., 1973; Jessen et al., 1973). This suggests that contraction of an actomyosin-like system may be involved in carrying the sperm into the egg. Direct observations on the behavior of the sperm during sperm-egg fusion are remarkably limited. This results in large :; part from the ...
... process (Tilney et al., 1973; Jessen et al., 1973). This suggests that contraction of an actomyosin-like system may be involved in carrying the sperm into the egg. Direct observations on the behavior of the sperm during sperm-egg fusion are remarkably limited. This results in large :; part from the ...
Patient Information For Egg Donors And Donor Egg
... The most important step in the egg donation process is the synchronization of the ovarian cycles of both the donor and the recipient. This ensures that the embryos are placed in the recipient’s womb at the optimal time for implantation. This is achieved by the use of birth control pills and Lupron, ...
... The most important step in the egg donation process is the synchronization of the ovarian cycles of both the donor and the recipient. This ensures that the embryos are placed in the recipient’s womb at the optimal time for implantation. This is achieved by the use of birth control pills and Lupron, ...
What is in vitro fertilisation (IVF) and how does it work?
... being inserted into the scanning probe and into each ovary. The eggs are, in turn, collected through the needle. Cramping and a small amount of vaginal bleeding can occur after the procedure. Step 5: fertilising the eggs Your eggs are mixed with your partner’s or the donor’s sperm and cultured in th ...
... being inserted into the scanning probe and into each ovary. The eggs are, in turn, collected through the needle. Cramping and a small amount of vaginal bleeding can occur after the procedure. Step 5: fertilising the eggs Your eggs are mixed with your partner’s or the donor’s sperm and cultured in th ...
KIC and IVF - Kiran Infertility Center
... doctor removes the same from ovaries. Generally, a needle is inserted through vaginal wall and eggs are taken out. Ultrasound is used for guidance. Next, doctor combines eggs with partner’s sperm in a laboratory dish. Each of the fertilized eggs will be a ball of cells called an embryo in two to fiv ...
... doctor removes the same from ovaries. Generally, a needle is inserted through vaginal wall and eggs are taken out. Ultrasound is used for guidance. Next, doctor combines eggs with partner’s sperm in a laboratory dish. Each of the fertilized eggs will be a ball of cells called an embryo in two to fiv ...
Dinosaur egg
Dinosaur eggs are eggs laid by dinosaurs. When the first scientifically documented remains of dinosaurs were being described in England during the 1820s, it was presumed that dinosaurs had laid eggs because they were reptiles. In 1859, the first scientifically documented dinosaur egg fossils were discovered in France by Jean-Jacques Poech, although they were mistaken for giant bird eggs. The first scientifically recognized dinosaur egg fossils were discovered in 1923 by an American Museum of Natural History crew in Mongolia. Since then many new nesting sites have been found all over the world and a system of classification based on the structure of eggshell was developed in China before gradually diffusing into the West. Dinosaur eggshell can be studied in thin section and viewed under a microscope. The interior of a dinosaur egg can be studied using CAT scans or by gradually dissolving away the shell with acid. Sometimes the egg preserves the remains of the developing embryo inside. The oldest known dinosaur eggs and embryos are from Massospondylus, which lived during the Early Jurassic, about 190 million years ago.