Egg
a structure which the females of certain animal species lay as a means of reproduction, it contains a fertilized zygote and nutrition in the form of yolk for the developing offspring, sometimes contains other substances (e.g.
egg
ovum; the mature female sex cell of an animal or plant
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Egg (biology)
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Amictic egg
Aspects of the topic amictic-egg are discussed in the following places at Britannica. Assorted References description ( in reproductive behaviour (zoology): Flatworms and rotifers ) ...
egg -- (1) A large gamete without flagellae that is fertilized by a sperm cell. An egg cell is also called an ovum. (2) A complex multicellular structure in which an animal embryo develops.
egg
A female gamete, which usually contains abundant cytoplasm and yolk; nonmotile and often larger than a male gamete.
ejaculatory duct ...
egg sac - a pouch of eggs
egg - the initial life stage of most animals
elateriform (larva) - a larva resembling a wireworm with a slender body, heavily sclerotized, with short thoracic legs and only a few body bristles (Glossary of PM) ...
The Egg
The frog egg is a huge cell; its volume is over 1.6 million times larger than a normal frog cell.
mictic egg
A thin shelled haploid egg. If not fertilized, they will produce males by parthenogenesis. If fertilized, they will accumulate a large amount of yolk and secrete a heavier, resistant shell.
amniote egg An egg with compartmentalized sacs (a liquid-filled sac in which the embryo develops, a food sac, and a waste sac) that allowed vertebrates to reproduce on land.
egg fragments (in sea urchins) that can divide and develop, even if they have only a haploid nucleus.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
egg The middle of three haploid cells at the micropylar end of the embryo sac; when fertilized, it will form the zygote.
egg apparatus Egg cell and adjacent synergids in the embryo sac (female gametophyte) of angiosperms.
Chicken egg white cystatin was first described in the late 1960s. Since then, our knowledge about a superfamily of similar proteins present in mammals, birds, fish, insects, plants and some protozoa has expanded, ...
As that egg develops into a fetus and grows into an animal, we know that the animal being born will be transgenic, ...
storage (egg whites of birds, reptiles; seeds)
transport (hemoglobin)
contractile (muscle) ...
Sperm and egg cells and their precursors. Germ cells are haploid and have only one set of chromosomes (23 in all), while all other cells have two copies (46 in all).
Germ line ...
The amniote egg contains extraembryonic membranes that are not part of the embryo and are disposed of after the embryo has developed and hatched.
[Gr. oon - an egg; Gr. kytos - a hollow vessel, modern usage: cyt- denotes a cell]. A female germ cell that must undergo two meiotic divisions to become a mature ovum.
merogones - egg fragments (in sea urchins) that can divide and develop, even if they have only a haploid nucleus.
mesenchyme - mesodermal cells in a developing embryo with the ability to move freely and individually.
When a sperm and an egg join together, they combine their half sets to make a unique, new set of 46 chromosomes.
Ovipositor: The egg-laying apparatus of a female insect.
Palp (palpus): Sensory organ attached to insect mouthparts that is used to test the quality of food.
A haploid sex cell, egg or sperm, that contains a single copy of each chromosome. GEM. A genetically engineered microorganism. Gene. A locus on a chromosome that encodes a specific protein or several related proteins.
Germ cell -- a sex cell or gamete (egg or spermatozoan).Haldane equation Haldane's law: the generalization that if first generation hybrids are produced between two species, but one sex is absent, rare, or sterile, ...
Haploid A single set of chromosomes (half the full set of genetic material), present in the egg and sperm cells of animals and in the egg and pollen cells of plants. Human beings have 23 chromosomes in their reproductive cells. Compare diploid.
All of the cells of your body originally came from a single cell, the fertilized egg or zygote. That cell divided repeatedly by mitosis to eventually form the trillion cells that make up your body.
They result from the fertilization of a single egg with a single sperm. And as those cells divide and multiply, at some point very early in embryonic growth they split into two individuals.
Typically, a sperm carries mitochondria in its tail as an energy source for its long journey to the egg. When the sperm attaches to the egg during fertilization, the tail falls off.
In an incompatible cross, the egg and sperm nuclei fail to unite during fertilization. The egg dies during embryogenesis. In some of these strains, Yen and Barr (1971) found substantial numbers of Rickettsia-like microbes in adults, eggs and embryos.
In the mammalian ovum the nutritive yolk is extremely small in amount, and is of service in nourishing the embryo in the early stages of its development only, whereas in the egg of the bird there is sufficient to supply the chick with nutriment ...
The notion that "all life [is] from [an] egg" (from the Latin "Omne vivum ex ovo") is a foundational concept of modern biology, it means that there has been an unbroken continuity of life from the initial origin of life to the present time.
Day 3: Weigh the egg and the amount of liquid in the beaker. The egg will be shriveled up and there will be an increase in the ml present in beaker. Place the egg in 200ml of water, cover and leave over night.
The chicken, or the egg? This riddle seems silly, but think about it. Without chickens, there could be no one to lay eggs. Yet, without eggs, there could be no chickens, because they could not have hatched. So which came first?
STREPTAVIDIN - A bacterial analog of egg white avidin.
STRINGENCY - The conditions employed for hybridization which determine the specificity of the annealing reaction between two single-stranded nucleic acid molecules.
Problem 8: Journey of the sperm to the egg
For fertilization to occur, sperm are deposited in the female _________, then enter the __________ through the opening known as the __________, and travel to the ____________, ...
Albumin the main protein in albumen‚ found in egg white
(albumin = the white of an egg)
Alcohol an organic molecule with at least one hydroxyl (-OH) group attached
(from Arabic al kohl = powder of antimony) ...
albumin [L. albus - white]. In reference to development, the egg white of birds eggs formed in the oviduct before the addition of the shell. It provides protein and water to the developing embryo and protection from microorganisms.
Zygote: A fertilized egg. Or the diploid cell that results from the joining of two haploid gametes (sperm and egg) during sexual reproduction, that will cleave to form an embryo. See also fertilization, gamete.
chorion. The outer membrane of an insect egg.
circulative virus. A virus that systemically infects its insect vector and usually is transmitted for the remainder of the vector's life; persistent virus.
Meiosis (my-OH-sis) The type of cell division that makes egg and sperm cells. Meiosis generates cells that are genetically different from one another and contain half the total number of chromosomes in the parent cell. See haploid.
Epigenesis
Development of a plant or animal from an egg or spore through a series of processes in which unorganized cell masses differentiate into organs and organ systems.
gametes - reproductive cells; sperm and egg cells in animals.
gene - section of a chromosome which codes for a protein or RNA product.
Enucleated oocyte (cytoplast): An egg cell from which the nucleus has been removed mechanically.
Lecithotrophic larva. A planktonic-dispersing larva that lives off yolk supplied via the egg
Leeward. The side of an island opposite from the one facing a persistent wind ...
In multicellular organisms, every cell in the organism's body derives ultimately from a single cell in a fertilized egg. The cell is also considered to be the basic unit in many pathological processes.
In reproduction, conception is the point at which a sperm fertilizes an egg.
Cystic fibrosis ...
Modified live virus vaccine derived from Flury rabies virus (Low Egg Passage) ...
Anisogamy: Sexual reproduction in which one sex produces sex cells much larger (egg) than those of the other (sperm).
interspecific cross A generative method in which the pollen donor and egg donor come from different species.
Monozygotic twins Two individuals derived from a single fertilised egg and therefore genetically identical.
epigenesis.
Related Terms:
Epigenesis
Development of a plant or animal from an egg or spore through a series of processes in which unorganized cell masses differentiate into organs and organ systems.
The sporophyte is a stalk that grows after the haploid sperm of one moss plant is able to mix with the haploid egg of a female moss plant. The resulting diploid cell grows into the sporophyte stalk.
 See also: Cells, Organ, Human, Cell, Animal
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