CH 11 Patterns in Inherited Traits

CH 11 Patterns in Inherited Traits - CH 11 Patterns in...

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CH 11 Patterns in Inherited Traits - Terms to know and simple inheritance patterns Human traits that follow a simple inheritance pattern: Widow’s peak Hitchhikers thumb Earlobe shape Dimples What is the dominant allele (form) for each gene?
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CH 11 Patterns in Inherited Traits - Remember genes, alleles, and chromosomes All five genes on this pair of chromosomes comprise a linkage group
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CH 11 Patterns in Inherited Traits - Gregor Mendel Gregor Mendel, an Austrian Monk, gathered the first experimental evidence of the genetic basis of inheritance. Between 1856 and 1863 Mendel cultivated and tested some 29,000 pea plants ( Pisum sativum Mendel showed evidence that genes are physical particles (units) that become segregated during gamete formation and that units specifying one trait (e.g. flower color) sort independently of units specifying other traits (e.g. seed shape).
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Mendel’s Method Parent – the P generation First filial offspring – the F 1 generation F 1 seed F 1 plant
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Mendel’s Results How can we predict these outcomes?
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Segregation and recombination during meiosis Recombination: genetically distinct from either parent. Alleles become segregated during gamete formation. This is now called Mendel’s Law of Segregation .
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What can we predict about the possible outcome of a cross between two parents from this F 1 generation?
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The “P” (parental) Cross True-breeding homozygous recessive parent plant True-breeding homozygous dominant parent plant F 1 PHENOTYPES (1st filial generation) pp Pp Pp Pp Pp Pp Pp Pp Pp P P PP p p
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An F 1 plant self-fertilizes and produces gametes: F 2
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This note was uploaded on 04/21/2011 for the course BIO 105 taught by Professor Staff during the Winter '08 term at Grand Valley State University.

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CH 11 Patterns in Inherited Traits - CH 11 Patterns in...

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