Worksheet+8+-+Lecture+17+-+Answer+Key - chromosomes 2...

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Bio 93 Pooja Patel Worksheet 8 – Lecture 17 [email protected] Lecture 17 – Simple Mendelian Genetics Mendel’s Laws 1. First Law a. Different versions of inherited characteristics are caused by alternate versions of a gene b. An organism inherits two alleles for each characteristic – one from each parent c. If alleles differ, one is dominant and the other is recessive d. Law of Segregation: The two alleles separate during gamete formation and are therefore present in different gametes e. Homologous chromosomes bear the two alleles for each characteristic e.i. Alternate forms of a gene reside at the same locus on homologous
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Unformatted text preview: chromosomes 2. Second Law a. Law of Independent Assortment: When two or more characteristics are inherited, each pair of alleles segregates into gametes independently • Genetic crosses can be calculated using a Punnett Square 1. Write down the phenotype 2. Write down the genotype 3. Write down the gametes 4. Work out the cross results • The Test Cross o Used to find out genotype of a parent when only phenotype is known • Mendelian inheritance follows rules of probability o Each toss is independent of all other tosses o Each toss has a ½ chance of being either outcome...
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This note was uploaded on 12/13/2011 for the course BIOSCI 93 taught by Professor Staff during the Fall '11 term at UC Irvine.

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