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Interphase occurs once before process beginsStarts with one cellChromosomes condense in prophaseThey both have spindle fibers and centriolesThe sister chromatids are held together by centromeresSection II: Genetic DiversityBriefly describe the following events and explain their role in creating genetic diversity:Proteins: Proteins are usually end products of gene expression. They are made from combinations of 20 different amino acids and have a wide range of biological functions.They are molecules that have the potential for enormous structural diversity and is the backbone of many biological systems. I think that proteins play a role in creating genetic diversity because of their significance in proteomics and how it lends data to bioinformatics and sequencing the genome.
Crossing over: Crossing over occurs in prophase I of meiosis. It is the exchange of chromosomal material between homologous chromosomes. During the diplotene stage,sister chromatids begin to separate, but still have the chiasma still intact where the chromatids are intertwined. The chiasma is said to be where the nonsister chromatids have undergone genetic exchange through the process of crossing over. This is important in genetic diversity because it is where combinations of new genetic material is formed.Independent assortment: Independent assortment is Mendel's fourth postulate. It states that during gamete formation, the segregation of any pair of unit factors happens independently of any other pairs. Because of random segregation, each gamete gets a member of each pair of unit factors and whatever unit factor is received, doesn't influence the outcome of segregation for any other pairs. The combination possibilities of gametes is formed in equal frequency because of this. This leads to a gene variabilityand diversity. Mutation: A mutation is a certain process that generates a modification in DNA or chromosome structure. In genes, this is expressed by making new alleles. Because the DNA is inheriting this change in its sequence, it is creating genetic diversity.