What is the main difference between the Gametic and the zygotic life cycles?
In the gametic life cycle, the gamete (egg or sperm) is the only haploid cell produced. In the zygotic life cycle, the zygote is the only diploid cell produced. In the sporic life cycle, you see alternating multicelled 2n and 1n generations.
What is the difference between zygotic and gametic meiosis?
The key difference between gametic sporic and zygotic meiosis is that gametic meiosis is the meiosis that occurs during the formation of male and female gametes while sporic meiosis is the meiosis that occurs during the sporogenesis and zygotic meiosis is the meiosis that occurs in the zygote.
What is life cycle with zygotic meiosis known as?
Therefore, zygotic and gametic meiosis are collectively termed “haplobiontic” (single mitotic phase, not to be confused with haplontic). Sporic meiosis, on the other hand, has mitosis in two stages, both the diploid and haploid stages, termed “diplobiontic” (not to be confused with diplontic).
What are the three types of life cycles?
A life cycle is a period involving one generation of an organism through means of reproduction, whether through asexual reproduction or sexual reproduction. In regard to its ploidy, there are three types of cycles; haplontic life cycle, diplontic life cycle, diplobiontic life cycle.
What is a Gametic life cycle?
The gametic life cycle is the reproductive cycle found in animals and some protistans. The term gametic refers to the fact that gametes are the result of meiosis. During the gametic life cycle a reproductive cell produces haploid gametes (sex cells such as egg and sperm) that combine to produce a zygote.
What does Gametic mean?
(găm′ēt′, gə-mēt′) A reproductive cell having the haploid number of chromosomes, especially a mature sperm or egg capable of fusing with a gamete of the opposite sex to produce a zygote.
What is a zygotic life cycle?
The zygotic life cycle is the simplest sexual life cycle, common among fungi and protists. These organisms are haploid during most of their life cycle. In the zygotic life cycle, the zygote is the only diploid phase. The cells undergo mitosis to either increase in number or grow into a haploid multicellular organism.
Does zygotic meiosis occurs in Fucus?
Zygotic meiosis is the characteristic of a) Fucus b) Funaria c) Marchantia d) Chlamydomonas. In zygotic meiosis, meiotic division happens in zygote resulting in the development of haploid individuals. Thallophytes have dominant gametophytic generation i.e., the proximity of haploid individuals.
What is meant by Diplobiontic life cycle?
This is the life cycle in which the haploid phase is followed by two successive diploid generations. In plants like Polysiphonia the haploid plant (gametophyte) produces diploid zygote after gametic fusion. This is called the diplobiontic life cycle. …
What is Gametic cell?
What is Gametic mutation?
A mutation is a change in either the gene/genotype or the DNA sequence. A somatic mutation is a change in the DNA sequence and a gametic mutation is a change in the gamete. Gametic mutations are passed on to future offspring whereas somatic only affects the individual because it is acquired after birth.
What is terminal or gametic meiosis?
Gametic or terminal meiosis occurs in animals. The cells resulting from the two meiotic divisions are transformed into sperms or eggs without further cell division. The process is as follows: Germs cells divide repeatedly to give rise to many generations of gonocytes.