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Transcript
Genetics – the study of how characteristics or traits are passed from parents to offspring. Geneticists tend to use capital and lower-case letters to name the Factors for any trait. The actual letter can change, depending on what is Being recorded, but the use of capital and lower-case letters is consistent. For Any trait, an individual likely has one of the following pairs: DD – two dominant factors. dd- two recessive factors. Dd – one dominant gene and one recessive gene for a trait. This is called a hybrid. In order for a recessive trait to show, the offspring must have two recessive factors (alleles) for that trait. Draw a chart similar to the one that follows. In the first column, list the four possible combinations of genotypes produced in the offspring when both parents have one dominant yellow gene and one recessive gene. In the second column write the corresponding phenotype of each offspring. Genotype Phenotype Drawing Punnett Squares Worksheet – U3L8 Genotype of parents: Genotype of parents: Genotype of parents: Genotype of parents: Genotype of parents: Genotype of parents: U3L9 – Interpreting a Pedigree U3L9 – Determining the Genotypes Pg. 224 – To Clone or Not to Clone? Consider the case of a brilliant scientist who has six months left to live. She is considering whether or not to clone herself so that her intelligence, living in a new body, can be used to continue her work.