Describe alternation of generations, Biology

Assignment Help:

Describe Alternation of Generations?

Alternation of Generations :  In meiosis, four haploid daughter cells are formed from one diploid mother cell. The life cycles of sexually reproducing organissm are divided into two phases, a haploid 1N phase, and a diploid 2N phase.

In simple organisms such as fungi, the haploid phase, which follows meiosis, extends through most of the life cycle. Eventually, one of the haploid cells becomes specialized to form a gamete, or sex cell. Gametes fuse, and the resulting diploid cell undergoes meiosis to form another haploid generation. In this case, the diploid phase is very short.

In mosses and ferns, haploid and diploid phases alternate so that there are two distinct forms, or generations, of the plant. One form is haploid and the other is diploid. In mosses, the haploid phase is most prominent, and in ferns, the diploid stage forms the large frond which we recognize as a fern. This type of organism, which alternates between haploid and diploid, is said to undergo alternation of generations in the life cycle.

80_the ferm life cycle.png


Related Discussions:- Describe alternation of generations

Planning and implementing nursing care - acute renal failure, Planning the ...

Planning the Nursing Care Monitor fluid intake and urinary output  Administer drugs as advised/prescribed  Monitor the child on dialysis  Provide therapeutic diet

Define the term- adaptation, Define the term- Adaptation The terms sco...

Define the term- Adaptation The terms scotopic and photopic vision are relative to the lighting conditions of an individual place. Light adaptation is a very quick process and

Budding- asexual reproduction, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Reproduction, write about asexual reproduction in mucor

write about asexual reproduction in mucor

Nephridia of worms, Normal 0 false false false EN-IN ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain the fructo oligosaccharides (fos), Explain the Fructo Oligosacchari...

Explain the Fructo Oligosaccharides (FOS)? FOS are polymers of fructose, usually attached to an initial glucose molecule. The total number of fructose units range from 2 to 8 a

Define pectin, Pectin The word pectin is derived from a Greek word whic...

Pectin The word pectin is derived from a Greek word which means to "congeal or solidify". Pectin is an acidic structural polysaccharide, found in fruit and vegetables and mainl

Which term explains to pituitary gland, In studies of human body, which of ...

In studies of human body, which of the subsequent terms can also be used when referring to the pituitary gland? Is it: a) Pancreas b) Hypozthesis (pron: hypo-fi-sis) c) T

What phrase best describes oxidation- reduction reaction, What phrase best ...

What phrase best describes oxidation- reduction reaction? A. phosphoryrylation energezing endergounic reactions b. transferring of electrons from one molecule to another c. shar

Cells, what are golgi apparatus

what are golgi apparatus

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd