Biology b final revie Study guides, Class notes & Summaries

What are alleles? How many alleles does an individual have for one particular trait? Alternative from of one gene. There are two alleles per trait. What are the sources of genetic variation in asexual and sexual organisms? 1. Mutations 2. Random Fertilization 3. Independent Assortment 4. Crossing Over What is the principle of independent assortment? Formation of random combinations of chromosomes in meiosis. A bird homozygous for black feathers and a bird homozygous fo...

Describe how cell reproduction contributes to repair and to growth cells divide in 2 ways, meiosis and mitosis, this creates new cells that get rid of the old and damaged ones contrast the 2 main ways organisms reproduce mitosis: 1 round of division, daughter cells are genetically the same meiosis: 2 rounds of division, daughter cells arent genetically the same describe the structure of a chromosome the centromere is in the middle of the "X" and the tips of the "X" are iden...

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