Mendel´s third law; Law of Independent Assortment

PowerPoint presentation created by Rafael G.Graciani that will talk about the Law of Independent Assortment; and other relevant aspects.

1. Mendel´s Third Law Independent Assortment Rafael González Graciani 10ºA

2. Index 1. Introduction; What are the Mendel´s laws ? 2. Who was Gregor Mendel? 3 . What is the third Mendel´s law? 4 . What process does independent assortment law follows? 5 . Additional Content 6 . Bibliography / References

3. Introduction; what are the Mendel´s laws? We could define Mendel´s laws as the basic laws that talks about the inheritance of biological features that every human being has. They were created by Gregor Johann Mendel in 1865. Mendel created three laws: The law of Segregation, the law of Independent Assortment and the law of Dominance. However, in my project I am going to focus on the law of Independent Assortment.

4. Who was Gregor Mendel? Gregor Johann Mendel was a really famous scientist that discovered the basic laws of inheritance. They were called Mendel´s laws. He was born on July 20th of 1822 in Austria and he died on January 6th 1884. He was a Catholic Augustinian. Referring to Mendel; the first investigations in genetics were done by Mendel. He started to get some conclusions. Their results found dominant characters that are characterized by determining the effect of a recessive gene and to have no genetic effect (say, expression) of a heterozygous phenotype.

5. What is the third Mendel's law? “Genes for different traits can segregate independently during the formation of gametes” “The Law of Independent Assortment , said that separate genes for separate traits are passed independently of one another from parents to offspring”

6. What process does independent assortment law follows? “Two pairs of genes (alleles) segregate independently of each other. Each character is independently inherited, and such characters combine randomly in all possible mathematical proportions. Interpreting the experiment If we study two characters such as stem length and pod color we can observe the following: The dominant allele A determines tall plants; the recessive a determines dwarf plants. The dominant allele B determines green pods; and the recessive b determines yellow pod. If we cross homozygous tall green-colored pod plants (AABB) with dwarf yellow-colored pod plants ( aabb ), all of the F1 generation is tall green- colored pod ( AaBb ). As those hybrids are allowed to self-pollinate (if the two characters segregate independently the gametes produced are: AB, Ab, aB , ab), the phenotypic ratio of the F2 generation is a 9:3:3:1. “

7. Additional Content https://www.youtube.com/watch?v=_43GcJWoQ5Y

8. Bibliography / References Biology and Geology 10th Grade SFP. (2015) (1st ed., p. 17). Sevilla . Sciencesfp.com,. (2015). Mendelian Concepts. Retrieved 20 January 2015, from http://www.sciencesfp.com/mendelian-genetics-principal-concepts-resolution-of-problems.html Wikipedia,. (2015). Mendelian inheritance. Retrieved 20 January 2015, from http://en.wikipedia.org/wiki/Mendelian_inheritance#Mendel.27s_laws YouTube,. (2015). Law of Independent Assortment. Retrieved 20 January 2015, from https://www.youtube.com/watch?v=_43GcJWoQ5Y