Question

can someone PLEASE explain to me in detail the Alteration of Generations?

Answer 1

aka: SPORIC LIFE CYCLE

Answer 2

alternation of generation mean alternation of one type of life (sporophytic) with one another (gametophytic). Here sexual cycle is important because it generate progenies that can withstand evolutionary selection. In most cases sporic cycle (more prominant in higher groups) will be diploid and gametophytic as haploid.

Answer 3

are you able to explain the sporophytic and gametophytic lives to me?

Answer 4

alternation of generations, also called Metagenesis, or Heterogenesis, in biology, the alternation of a sexual phase and an asexual phase in the life cycle of an organism. The two phases, or generations, are often morphologically, and sometimes chromosomally, distinct.

In algae, fungi, mosses, ferns, and seed plants, alternation of generations is common; it is not always easy to observe, however, since one or the other of the generations is often very small, even microscopic. The sexual phase, called the gametophyte, produces gametes, or sex cells; the asexual phase, or sporophyte, produces spores asexually. In terms of chromosomes, the gametophyte has a single (i.e., monoploid, or haploid) set, and the sporophyte has a double (diploid) set.

Among animals, many invertebrates have an alternation of sexual and asexual generations (e.g., protozoans, jellyfish, flatworms), but the alternation of haploid and diploid generations is unknown.

Answer 5

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/Alternation.html

Answer 6

@bmelyk, sporophyte (Greek) the term literally meaning spore-bearing. Sporophyte stage is the asexual phase of the life cycle of a plant and some algae that exhibits a double set of chromosomes. In the sporophyte phase, a diploid plant body grows and eventually produces spores through meiosis. Gametophyte mean 'gamete bearing'. The first cell in a sporophyte generation is the diploid zygote, while the first cell in the gametophyte stage (the sexual phase of life cycle) is haploid.