Gene and Daughter Cells
Meiosis is the process by which cells divide and create living creatures. Without meiosis we cannot have the process of mitosis, which is the process by which cells of tissue are created for living creatures. When meiosis occurs 4 daughter cells are created, while only 2 are created in mitosis. With the creation of 2 daughter cells the new cells will be similar to the parent cell, but will have differences, as there more parent cells involved. When mitosis occurs the daughter cells will be identical to the parent cell, since only 1 cell is involved.
Meiosis is needed for sexual reproduction, while mitosis is needed for general growth, repair, and cellular reproduction of the body. The process of mitosis is not involved in any sex cell, and meiosis is not involved in any cell with the exception of sex cells. Since meiosis has more cells involved (parent cells) this process has a few more steps than what mitosis does. There are several similarities between the process of mitosis and meiosis. For example both processes occur at the cellular level. Both processes share genetic material from the parent cell to the daughter cell.
Gene and Daughter Cells Essay Example
In conclusion without meiosis we would not be created and therefore not need the process of meiosis, because cells would not be able to form. http://faculty. stcc. edu/BIOL102/Lectures/lesson9/stepbystep. htm http://utahscience. oremjr. alpine. k12. ut. us/sciber00/7th/genetics/sciber/compare. htm http://www. reference. com/motif/science/list-of-similarities-between-mitosis-and-meiosis W4A2 Mendel used mathematics and experimentation to derive major principles that have helped us understand inheritance.
His ideas were totally different than the explanation for passage of characteristics from parents to offspring that was common to his time. List and describe his principles and describe how each contributes to genetic variability. How might biology have be different if his discoveries had not been lost for decades? Be prepared to discuss the significance of Mendel’s discoveries to modern biology. The four principles or laws that Gregor Mendel derived are: Law of Unit Characters, Law of Segregation, Law of Independent Assortment, and Law of Dominance.
The Law of Unit Characters is stated as the genetic character of an organism is controlled in units existing in pairs. Mendel’s Law of Segregation stated that alleles (one form of a pair) separate during reproduction of the cell, therefore each reproductive cell contains only one copy of each paired unit factor. Mendel’s Law of Independent Assortment states pairs of chromosomes both contain a paternal and maternal copy that are sorted out for distribution into one gamete or another.
This Law in short terms means that we are able to receive traits from one parent or the other, but not all traits come from one parent. We all can think of certain characteristics that we received from our mother, and likewise our father making each and every one of us unique. The last Law of Dominance is when one pair of alleles is coded for a specific trait is expressed while the other allele is unexpressed. The expressed allele is considered to be dominant, while the unexpressed allele is considered to be recessive. This means that the dominant gene will be passed on more often than the recessive gene.
A good example of this would be the gene for blue eye color is recessive, and the gene for brown eye color is dominant, so there are more brown eyed people than there are blue eyed. Without Gregor Mendel some families may not be able to have babies, but thanks due to Mendel, in-vitro is now able to be used. Mendel even affects some of the foods we eat, with application to his ideas scientists are now able to alter fruits and vegetables to not only last longer, but also to grow larger than ever before. http://www. collinsdictionary. com/dictionary/american/mendel-s-laws