Meiosis 1 And Mitosis: Genetic Differences
Unit 5 Free Response
Meric Pope
Meiosis 1 and Mitosis are very similar events, however, they have certain differences. One difference is crossing over. Meiosis 1 does cross over and because of that, it creates genetic changes. Mitosis , on the other hand, does not cross over. Something else that is different is the way it occurs. Meiosis 1 is sexual but Mitosis is asexual. Another change is the number of divisions that each event goes through. Meiosis 1 goes through 2 divisions which ends up having 4 haploid cells, however Mitosis only has 1 division resulting in 2 diploid cells. Gregor Mendel came up with 2 main ideas/laws to attribute to his Principle of Dominance. This principle says when two pure, contrasting traits are crossed, the …show more content…
Secondly, The Law of Independent Assortment states that genetic traits are inherited independently of one another. When Mendel worked with garden peas, the conclusions he arrived at worked for garden peas because this plant has alternate alleles for height, tall and short, with clear dominance. Also, the traits he studied were inherited independently of one another. However, other organisms don't necessarily inherit traits in the same way as pea plants. There are 3 major exceptions. 1) Autosomal linkage, this deviates from Mendel's conclusions regarding Independent Assortment because if different genes on the same chromosome are close together, they may be inherited as a single unit. For example, in fruit flies the genes determining the eye color and wing length are inherited together. This is called a linkage group. 2) Sex-linked inheritance, also deviates from Mendel's idea of the Law of Independent Assortment, because sometimes, the X chromosome can also have linked to it the gene for hemophilia or color-blindness. Thus, while inheriting one of their sex chromosomes, a person at the same time will receive a gene for this condition. This deviates from Mendel's Second Law. 3) Polygenic inheritance also contradicts Mendel's
Meric Pope
Meiosis 1 and Mitosis are very similar events, however, they have certain differences. One difference is crossing over. Meiosis 1 does cross over and because of that, it creates genetic changes. Mitosis , on the other hand, does not cross over. Something else that is different is the way it occurs. Meiosis 1 is sexual but Mitosis is asexual. Another change is the number of divisions that each event goes through. Meiosis 1 goes through 2 divisions which ends up having 4 haploid cells, however Mitosis only has 1 division resulting in 2 diploid cells. Gregor Mendel came up with 2 main ideas/laws to attribute to his Principle of Dominance. This principle says when two pure, contrasting traits are crossed, the …show more content…
Secondly, The Law of Independent Assortment states that genetic traits are inherited independently of one another. When Mendel worked with garden peas, the conclusions he arrived at worked for garden peas because this plant has alternate alleles for height, tall and short, with clear dominance. Also, the traits he studied were inherited independently of one another. However, other organisms don't necessarily inherit traits in the same way as pea plants. There are 3 major exceptions. 1) Autosomal linkage, this deviates from Mendel's conclusions regarding Independent Assortment because if different genes on the same chromosome are close together, they may be inherited as a single unit. For example, in fruit flies the genes determining the eye color and wing length are inherited together. This is called a linkage group. 2) Sex-linked inheritance, also deviates from Mendel's idea of the Law of Independent Assortment, because sometimes, the X chromosome can also have linked to it the gene for hemophilia or color-blindness. Thus, while inheriting one of their sex chromosomes, a person at the same time will receive a gene for this condition. This deviates from Mendel's Second Law. 3) Polygenic inheritance also contradicts Mendel's