Using what you know about the term mosaic, write a paragraph describing another biological mosaic.

Mosaic is a system in which a person or tissue contains genetically different cells.

Mosaic means the presence of genetically different cells in one body. All Females are mosaics due to the inactivation of X chromosomes.

Mosaic is a condition in which a multicellular organism possesses more than one genetic cell. This happens due to genetic mutation.

Firstly, Mosaicism is studied in drosophila in 1929 by Alfred Sturtevant. There is a hypothesis, that mosaic is the result of the break and loss of one or more chromosomes.

Germ line mosaicism occurs in gametes that are sperms and oocytes. Somatic mosaicism happens in somatic cells of the body. Due to this, they contain more than one genotype in the cell.

As a result, mosaic is a state in which many genetic cells coexist in the same body.

Learn more about mosaic, here:

link

The term mosaic is used in arts for an art piece that is composed of many small pieces of materials like stones or glasses. However, in biology it is used for a structure that is made up of different types of cells.

Now if we have to describe a biological mosaic structure , then there is no perfect option than the structure of a cell membrane of animals' cells. Cell membrane is not made up of two types of cell at all but it is a structure that is composed of a lipid bilayer in which proteins are floating as you can see in picture.

The structure was explained as mosaic by fluid mosaic model. If we take a deep look, the double layer of lipids are made up of phospho lipids, which contain two fatty acid tails and a lipid head.  The heads are hydrophilic and are outside while tails are hydrophobic and they are inside. This structure has alot of importance as per the function of cell membrane because it  maintains the cell's internal environment and separates it from outer environment. This is because

As cell is surrounded by an environment which contain water in excessive amount, therefore nature has made cell membrane in a way that hydrophobic tails do not face water and stay inside the double membrance while hydrophillic heads face the water region outside the cell as well as inside the cell (cytoplasm that contains alot of water content too).

Hope it helps!

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

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