asexual and sexual

7/31/2019 Asexual and Sexual

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In sexual reproduction , two parents donate genes to their young, resultingin offspring with a mix of inherited genes. These genes are donated througha process called fertilization. There are two mechanisms by whichfertilization can take place.

The first is external (the eggs are fertilized outside of the body).

The second is internal (the eggs are fertilized within the female reproductivetract).
http://biology.about.com/library/weekly/aa091400a.htmhttp://biology.about.com/library/weekly/aa091400a.htm


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Sexual reproduction needs two parents. Each parent produces sex cells, calledgametes:

male gametes are called spermfemale gametes are called eggs

Each gamete contains half the number of chromosomes that a body cell has.

At fertilisation , a male and female gamete fuse or join together. The new cellcontains the full number of chromosomes.Half of its genes have come from the father, and half have come from the mother.The genetic material from both parents has combined to form a unique individual.


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http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway/ourselves/6_gene_control2.shtml


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Asexual reproduction onlyneeds one parent.

All the offspring aregenetically identical toeach other, and theirparent. They are clones.


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Binary fissionIn binary fission the parent organism isreplaced by two daughter organisms,because it literally divides in two.Many single-celled organisms, bothprokaryotes (the archaea and thebacteria ), and eukaryotes (such asprotists and unicellular fungi ),reproduce asexually through binaryfission; most of these are also capableof sexual reproduction. Some single-celled organisms rely on one or morehost organisms in order to reproduce
http://en.wikipedia.org/wiki/Prokaryotehttp://en.wikipedia.org/wiki/Archaeahttp://en.wikipedia.org/wiki/Bacteriahttp://en.wikipedia.org/wiki/Eukaryotehttp://en.wikipedia.org/wiki/Protisthttp://en.wikipedia.org/wiki/Fungihttp://en.wikipedia.org/wiki/Host_(biology)http://en.wikipedia.org/wiki/Host_(biology)http://en.wikipedia.org/wiki/Fungihttp://en.wikipedia.org/wiki/Protisthttp://en.wikipedia.org/wiki/Eukaryotehttp://en.wikipedia.org/wiki/Bacteriahttp://en.wikipedia.org/wiki/Archaeahttp://en.wikipedia.org/wiki/Prokaryote


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Budding Buding is a form of asexualreproduction in which a neworganism grows on another one.The new organism remainsattached as it grows, separatingfrom the parent organism onlywhen it is mature. Since the

reproduction is asexual, the newlycreated organism is a clone and isgenetically identical to the parentorganism.
http://en.wikipedia.org/wiki/Asexual_reproductionhttp://en.wikipedia.org/wiki/Asexual_reproductionhttp://upload.wikimedia.org/wikipedia/commons/c/c3/Budding_yeast_Lifecycle.pnghttp://en.wikipedia.org/wiki/Asexual_reproductionhttp://en.wikipedia.org/wiki/Asexual_reproduction


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Vegetative reproduction (vegetative propagation ,vegetativemultiplication ,vegetative cloning )Vegetative reproduction isa form of asexualreproduction in plants. It isa process by which newindividuals arise withoutproduction of seeds orspores . It can occurnaturally or be induced byhorticulturists .
http://en.wikipedia.org/wiki/Asexual_reproductionhttp://en.wikipedia.org/wiki/Asexual_reproductionhttp://en.wikipedia.org/wiki/Seedhttp://en.wikipedia.org/wiki/Sporehttp://en.wikipedia.org/wiki/Horticulturehttp://www.youtube.com/watch?v=GNnkYTQBlRo&feature=relatedhttp://en.wikipedia.org/wiki/Horticulturehttp://en.wikipedia.org/wiki/Sporehttp://en.wikipedia.org/wiki/Seedhttp://en.wikipedia.org/wiki/Asexual_reproductionhttp://en.wikipedia.org/wiki/Asexual_reproduction


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SporogenesisSporogenesis is the production ofspores in biology . The term is alsoused to refer to the process of

reproduction via spores. Reproductivespores are formed in many eukaryotic organisms, such as plants , algae andfungi , during their normal reproductivelife cycle . Dormant spores areformed, for example by certain fungiand algae, primarily in response tounfavorable growing conditions. Mosteukaryotic spores are haploid andform through cell division, thoughsome types are diploid or dikaryons and form through cell fusion.
http://en.wikipedia.org/wiki/Sporehttp://en.wikipedia.org/wiki/Biologyhttp://en.wikipedia.org/wiki/Reproductionhttp://en.wikipedia.org/wiki/Eukaryotehttp://en.wikipedia.org/wiki/Planthttp://en.wikipedia.org/wiki/Algaehttp://en.wikipedia.org/wiki/Fungushttp://en.wikipedia.org/wiki/Biological_life_cyclehttp://en.wikipedia.org/wiki/Haploidhttp://en.wikipedia.org/wiki/Diploidhttp://en.wikipedia.org/wiki/Dikaryonhttp://upload.wikimedia.org/wikipedia/commons/8/86/Sporic_meiosis.pnghttp://en.wikipedia.org/wiki/Dikaryonhttp://en.wikipedia.org/wiki/Diploidhttp://en.wikipedia.org/wiki/Haploidhttp://en.wikipedia.org/wiki/Biological_life_cyclehttp://en.wikipedia.org/wiki/Fungushttp://en.wikipedia.org/wiki/Algaehttp://en.wikipedia.org/wiki/Planthttp://en.wikipedia.org/wiki/Eukaryotehttp://en.wikipedia.org/wiki/Reproductionhttp://en.wikipedia.org/wiki/Biologyhttp://en.wikipedia.org/wiki/Spore


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Fragmentation or ClonalFragmentation Fragmentation is when an organism is

split into fragments. Each of thesefragments develop isms is a form ofasexual reproduction into mature, fullygrown individuals that are clones of theoriginal organism.The splitting may or may not beintentional, if the splitting occurs withoutthe prior preparation of the organism,both fragments must be able toregenerate the complete organism for itto function as reproduction.
http://en.wikipedia.org/wiki/Organismhttp://en.wikipedia.org/wiki/Asexual_reproductionhttp://en.wikipedia.org/wiki/Reproductionhttp://en.wikipedia.org/wiki/Regeneratehttp://en.wikipedia.org/wiki/Regeneratehttp://en.wikipedia.org/wiki/Reproductionhttp://en.wikipedia.org/wiki/Asexual_reproductionhttp://en.wikipedia.org/wiki/Organism


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Agamogenesis

Agamogenesis is any form of reproduction that does not involve a malegamete.


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http://www.sciencekids.co.nz/gamesactivities.html

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