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Transcript
Name: __________________________ Notes – Genetics I Date: __________/Page#: ____ Mr. Jensen/Period: ____ Genetics I note sheet What is Genetics? ___________________________________________________________________________ _____________________________________________________ The Father of Genetics • _____________________________ an Austrian monk, studied the variety of traits (different characteristics) in pea plants • His experiments are now considered to be the beginning of the science of genetics! Here is what Mendel did: • He took the __________________ (male sex cells) from one pea plant and transferred it to the ________________ (female part) of another pea plant • This is called _____________________________________. Mendel found that: • He was able to cross pea plants with _________________________ traits • After the 1st cross, the F1 generation would show certain traits while some traits seemed to be ___________________________ • After the 2nd cross, certain traits would ____________________ in the F2 generation An example of one of Mendel’s crosses. White flowers are dominant to pink flowers. P generation X F1 generation Cross F1 generation F2 generation More traits in pea plants that Mendel studied. X Based on his findings, Mendel stated: 1. The law of segregation – when the parent forms sex cells, the parent gene pairs separate, one gene from each pair goes to each sex cell Parent genotype: Sex cells: A Aa a 2. The law of independent assortment – each gene pair for a trait is inherited independently of the gene pairs for all other traits