1. Summary of eukaryotic Life Cycles

In inter-base.netlogy, a life bicycle (or life history) describes the course of advancement of an organism. A life cycle is the entire history of one organism, usually shown through a series of developmental stages that depicts the alters a types goes with as they happen from the begin of a provided developmental phase to the beginning of the same developmental phase in the following generation.

You are watching: Select the correct statement about reproduction and eukaryotic life cycles.

The key differences between eukaryotic life cycles is the lot of time invested in haploid vs. Diploid phases and the meiotic commodities (spores vs. Gametes) that space produced. Recall the haploid cell contain only one set of chromosomes (n). Diploid cells contain two sets of chromosomes (2n).Meiosisis the process by i beg your pardon diploid cells divide double in a row after replicating their chromosomes just once. The result is that each last daughter cell is haploid and also contains just one copy of each chromosome. This differs frommitosis, once cells divide however the number of chromosome sets remains the same. In mitosis, haploid cells divide to form haploid cells and also diploid cells division to kind diploid cells.

Diploid cells contain 2 duplicates of your genome, they typically:

1. Administer genetic redundancy which deserve to increase resistance to DNA damage (there is a "back-up" copy of DNA in the occasion that one it s okay damaged).2. Benefit from hereditary exchange with other individuals, which have the right to potentially provide an ext genetic diversity and thus offers a better potential for survival in a changing environment.3. Have actually slower growth due to the fact that they have a much longer cell cycle due to a greater amount the DNA to it is in replicated v each cell division.

Since haploid cells have only one copy of your genome they are typically:

1. An ext vulnerable come genetic damage (no "back-up" copy of DNA).2. May be to prosper faster since they don"t have actually as lot DNA to replicate with each cell cycle.3. May be to incorporate with various other haploid cells via fertilization.

In addition to cabinet division, another vital stage in every life bicycle is fertilization, or the combination of two cells, which results in the development of a diploid cell, the zygote.

We will now review the three major types of eukaryotic inter-base.net life cycles (sporic, zygotic and gametic) in much more detail.

Gametic Life Cycle

The gametic life bicycle is the reproductive cycle uncovered in animals and some protistans. The ax gametic refers to the reality that gametes are the an outcome of meiosis.

During the gametic life bike a reproductive cabinet produces haploid gametes (sex cells such as egg and sperm) that integrate to produce a zygote. The zygote grow by cell division and cabinet elongation to produce a multicellular diploid individual. In the gametic life cycle, the gametes room the just haploid stage found in the life cycle. The gametes (egg and sperm) space the just haploid cells produced.

Eukaryotic Life Cycles Tutorialby Dr. Katherine Harris is license is granted under aCreative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

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