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Sperm-egg.jpg

For soil improvement see Fertilizer.

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Wikipedia About Fertilization

Sperm-egg.jpg

For soil improvement see Fertilizer.

Fertilisation

The entire process of development of new individuals is called procreation, the act of species reproduction.

Flowering plants

After the pistil is pollinated, the pollen grain germinates in a response to a sugary fluid secreted by the mature stigma (mainly sucrose). From each pollen grain, a pollen tube grows out that attempts to travel to the ovary by creating a path through the female tissue. The vegetative (or tube) and generative nuclei of the pollen grain pass into its respective pollen tube. The growth of the pollen tube is controlled by the vegetative (or tube) cytoplasm. Hydrolytic enzymes are secreted by the pollen tube that digest the female tissue as the tube grows down the stigma and style; the digested tissue is used as a nutrient source for the pollen tube as it grows. During pollen tube growth toward the ovary, the generative nucleus divides to produce two separate sperm nuclei(haploid number of chromosomes) - a growing pollen tube therefore contains three separate nuclei. The pollen tube does not directly reach the ovary in a straight line. It travels near the skin of the style and curls to the bottom of the ovary, then near the receptacle, it breaks through the ovule through the micropyle (an opening in the ovule wall) and the pollen tube "bursts" into the embryo sac. After this happens the pollen tube nucleus disintegrates, and one male sperm fuses to the female egg cell, whilst the other fuses to two polar nuclei(triploid number of chromosones). This is the point when fertilisation actually occurs. Note that pollination and fertilisation are two separate processes. After being fertilised, the ovary starts to swell and will develop a fruit. With multi-seeded fruits, multiple grains of pollen are necessary for syngamy with each ovule.

The process is easy to visualize if one looks at maize silk, which is the female flower of corn. Pollen from the tassel (the male flower) falls on the sticky external portion of the silk, and then pollen tubes grow down the silk to the attached ovule. The dried silk remains inside the husk of the ear as the seeds mature; if one carefully removes the husk, the floral structures may be seen.

In many plants, the development of the flesh of the fruit is proportional to the percentage of fertilised ovules. For example, with watermelon, about a thousand grains of pollen must be delivered and spread evenly on the three lobes of the stigma to make a normal sized and shaped fruit.

Double fertilisation anchor: double fertilisation

Double fertilisation is the process in angiosperms (flowering plants) during reproduction, in which two sperm nuclei from each pollen tube fertilise two cells in an ovary. The pollen grain adheres to the stigma of the carpel (female reproductive structure) and grows a pollen tube that penetrates the ovum through a tiny pore called a micropyle. Two sperm cells are released into the ovary through this tube. One of the two sperm cells fertilises the egg cell (at the bottom of the ovule near the micropyle), forming a diploid (2n) zygote. The other sperm cell fuses with two haploid polar nuclei (contained in the central cell) in the centre of the embryo sac (or ovule). The resulting cell is triploid (3n). This triploid cell divides through mitosis and forms the endosperm, a nutrient-rich tissue, inside the seed.

Search results for Fertilization

fertilization definition | Dictionary.com

Definition of fertilization at Dictionary.com with free online dictionary, ... where does fertilization take place in humans. cramping occur during fertilization ...dictionary.reference.com/browse/fertilization

Pregnancy and Conception

Learn more about the pregnancy calendar and conception date. ... Within 24-hours after fertilization, the egg begins dividing rapidly into many cells. ...www.webmd.com/baby/guide/understanding-conception

Sexual Reproduction

Copulation and Fertilization. Pregnancy. The placenta is ... In Vitro Fertilization (IVF) Intracytoplasmic Sperm Injection (ICSI) ... and Fertilization ...users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/Sexual_Rep...

Part 2: From Ovulation to Conception and Fertilization of the Ovum

Conception and Fertilization: Getting Pregnant During The Luteal Phase of Your Cycle ... With fertilization, the ovum becomes the zygote or embryo and now ...www.early-pregnancy-tests.com/conceive.html

fertilization (reproduction) -- Britannica Online Encyclopedia

Britannica online encyclopedia article on fertilization (reproduction), union of a spermatozoal nucleus, of paternal origin, with an egg nucleus, of maternal origin, ...www.britannica.com/EBchecked/topic/205305/fertilization

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News about Fertilization

O's Star & Wife Embrace Life With Multiples

CBS 13 BaltimoreOnce considered rare, multiple births are now far more common thanks to advances in medical science. Nobody knows that more than the Moras.http://wjz.com/local/gisel.melvin.mora.2.1004777.html

How do your roses grow? Great in the desert

The Desert SunThe Coachella Valley is marked by nearly year-round sunshine and little rain, an ideal climate for roses.http://www.mydesert.com/article/20090509/COLUMNS38/905080354...

A surrogate's journey

Billings GazetteA Dutch woman and her Israeli husband's compulsion to have children took them on a journey across three continents. The quest ended in Billings, where a surrogate mom from Montana gave birth to twins. ...http://www.billingsgazette.net/articles/2009/05/09/features/...

Surrogacy has darker side

Billings GazetteIn late April, when actors Matthew Broderick and Sarah Jessica Parker told the world they were expecting twin daughters this summer through a surrogate pregnancy, their announcement barely created a stir. But other headlines last month cast surrogacy' ...http://www.billingsgazette.net/articles/2009/05/09/features/...

Octomom to Have Half Her Uterus Removed

Fox NewsAfter giving birth to 14 children, octomom Nadya Suleman will have half of her uterus removed, the Daily News reported.http://www.foxnews.com/story/0,2933,519482,00.html

News about Fertilization

Gold Dome Live

Atlanta Journal ConstitutionOpponents say the new version of the bill would criminalize stem cell research in Georgia and place a chilling effect on the practice of in-vitro fertilization. Supporters say it’s an attempt to respect the right of life, even an embryonic potential ... http://www.ajc.com/blogs/content/shared-blogs/ajc/georgia/en...

Georgia Bill Would Increase Regulation Of In Vitro Fertilization ...

Medical News TodayGeorgia lawmakers have introduced a bill ( S.B. 169 ) that would place restrictions on the number of embryos that could be implanted in a woman during an in vitro fertilization procedure, the Wall Street Journal reports. The bill "appears to be the ... http://www.medicalnewstoday.com/articles/141018.php

Government has no place in debate about fertilization

MercuryNo comments posted. The case of "octo-mom" Nadya Suleman and her brood has sparked a national debate. Ever since the California mother of six young children gave birth to eight more — through embryos implanted at a fertility clinic — criticism ... http://www.pottsmerc.com/articles/2009/03/09/opinion/srv0000...

Letter to the editor: N.D. bill could lead to Roe v. Wade’s ...

Jamestown SunWhat is interesting is science has proved at conception or fertilization that we have a unique DNA human profile. This means that everything about us has already been established at conception, such as the color of our eyes. Therefore, science has ... http://www.jamestownsun.com/articles/index.cfm?id=81839§...

Senate panel sends “octuplet mom” bill to study committee

Atlanta Journal ConstitutionSenate Bill 169 was introduced in reaction to the California woman who gave birth recently to octuplets through in-vitro fertilization. Nadya Suleman already had six children and was on public assistance. Before a packed room, senators heard testimony ... http://www.ajc.com/blogs/content/shared-blogs/ajc/georgia/en...

Search results for Fertilization

fertilization definition of fertilization in the Free Online ...

fertilization, in biology, process in the reproduction reproduction, capacity of all living systems to give rise to new systems similar to themselves.http://encyclopedia2.thefreedictionary.com/fertilization

fertilization - definition of fertilization by the Free Online ...

fer·til·i·za·tion (fûr tl--z sh n) n. 1. The act or process of initiating biological reproduction by insemination or pollination. 2. The union of male and female gametes to ... http://www.thefreedictionary.com/fertilization

fertilization - Hutchinson encyclopedia article about fertilization

In sexual reproduction, the union of two gametes (sex cells, often called egg or ovum, and sperm) to produce a zygote, which combines the genetic material contributed by each ... http://encyclopedia.farlex.com/fertilization

Fertilization: Introduction

Fertilization: Introduction. Fertilization is the "great awakening" of the oocyte. Dr. Jerry Schatten (Dept. of Zoology, Univ. of Wisconsin-Madison), has likened fertilization to ... http://worms.zoology.wisc.edu/frogs/fert/fert_intro.html

fertilization - OneLook Dictionary Search

Quick definitions (fertilization) ▸ noun: making fertile as by applying fertilizer or manure ▸ noun: creation by the physical union of male and female gametes; of sperm and ova ... http://www.onelook.com/?w=fertilization&ls=a

Wikipedia results for Fertilization

Fertilisation - Wikipedia, the free encyclopedia

Fertilisation (also known as conception, fecundation and syngamy), is the fusion of ... Fertilization · Egg activation · Zygote · Cleavage · Morula · Blastula · Blastocyst · ... http://en.wikipedia.org/wiki/Fertilization

Human fertilization - Wikipedia, the free encyclopedia

Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. It is also the initiation of prenatal development.http://en.wikipedia.org/wiki/Human_fertilization

Internal fertilization - Wikipedia, the free encyclopedia

Internal fertilization is a form of fertilization of an egg by within the body of an animal, whether female or hermaphroditic. This is distinct from external fertilization, where ... http://en.wikipedia.org/wiki/Internal_fertilization

Iron fertilization - Wikipedia, the free encyclopedia

Iron fertilization is the natural or intentional introduction of iron, an essential nutrient, to the upper ocean to stimulate the marine food chain and to sequester carbon dioxide ... http://en.wikipedia.org/wiki/Ocean_iron_fertilization

Fertilizer - Wikipedia, the free encyclopedia

Regardless of the source, fertilization results in increased unharvested plant biomass left on the soil surface and crop residues remaining in the soil.http://en.wikipedia.org/wiki/Fertilizer
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Videos found for Fertilization

Octuplets Stir Ethical Debate On Fe...

Octuplets Stir Ethical Debate On FertilizationFertilization experts are questioning why a mother of six would want to be implanted again. Leyna Nguyen reports.Windows Media - Video

Cost of Fertility

Cost of FertilityJune 10 - More than 120,000 in vitro fertilization procedures took place in 2003 at a cost of more than $12,000 each. Paying for the treatments is just one of the aspects of this...Flash - Video

Fertility laws set for overhaul

Fertility laws set for overhaulone of a voice two more teams try to twenty years to become parents finally in nineteen ninety seven Lee's gave birth to twins after eleven attempts at IVF the experience...Video - Video

Fertility Clinic Offers Money-Back ...

Fertility Clinic Offers Money-Back GuaranteeIn-vitro fertilization can be costly, so a Minn. fertility clinic is now offering a money-back guarantee if you don't have a child, Dennis Douda reports (3:00).Windows Media - Video

OVNI - UFO - Celestial Fertilizatio...

OVNI - UFO - Celestial Fertilization http://yosoytu.net/ Spectacular images of an Extraordinary, MYSTERIOUS and unexplained LENTICULAR CLOUDS. Magical celestial phenomenon that remained for 7 hours....Flash - Video

Answers for Fertilization

superherofertilization?superherocould someone please explain in layman's language!!!!Christine DWhat is the difference between pollination and fertilization?Christine DA is the correct answer. Pollination is the movement from male to female region and fertilization is the union and sperm and egg.Row BoatWhat are the advantages and disadvantages of external fertilization and internal fertilization?Row BoatTazmanianIs her egg in a fertilization period if her menstrual period is due in 10 days?TazmanianANY TIME YOU HAVE SEX YOU RISK THE CHANCE OF PREGNANCY. Its as simple as that really. No matter when the period is due, no matter what protection you use, you risk the chance of pregnancy ANY TIME...Kristy BHow long does it take for fertilization to occur?Kristy BAfter ejaculation, sperm swim through the vaginal canal and into the cervix then into the fallopian tubes. The sperm immediately make their journey upon ejaculation. I do not believe anyone really kno...
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