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

Change of health status over time, Change of Health Status Over Time Hea...

Change of Health Status Over Time Health of a nation can be gauged from the available information on death.Disaggregated data by causes of death is more reflective of the status

Diseases of poultry, DISEASES OF POULTRY - Poultry birds suffer from a ...

DISEASES OF POULTRY - Poultry birds suffer from a variety of diseases - Nutritional            -          Rickets Viral                    -          Ranikhet Bact -

Define theophrastus of eresus - taxonomy, Define Theophrastus of Eresus - T...

Define Theophrastus of Eresus - Taxonomy The Father of Botany (370-285 B.C.); of all the men who ever lived upon the earth certainly one of the most remarkable was Theophrastu

Zoology, Classification of the Phylum Protozoa up to orders

Classification of the Phylum Protozoa up to orders

Excretion, Excretory organ for protozoa

Excretory organ for protozoa

Adaptations, what are some adaptations of flatworms

what are some adaptations of flatworms

Effects of insulin on carbohydrate metabolism, Insulin promotes muscle gluc...

Insulin promotes muscle glucose uptake and metabolism. In presence of insulin muscle cells take up glucose and use it as a source of energy. Insulin also promotes storage of insuli

Limerick, how do we write a limerick spell?

how do we write a limerick spell?

Show Relation between tissue and the implant material, Relation between Tis...

Relation between Tissue and the implant material The biologic interaction between the tissue and the implant material at an  interface may result in a variety of phenomena such

Explain about the obliques muscles, Explain about the Obliques muscles ...

Explain about the Obliques muscles The superior and inferior oblique muscles form an angle of about 51 0 with the optical axis. The oblique muscles produce cyclorotation becau

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