IntroBio-09 - Mendelian Genetics

IntroBio-09 - Mendelian Genetics - Mendelian Genetics 1...

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Mendelian Genetics 1
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Gregor Mendel (1822 1884) Evidence of gene transmission from parents to offspring Laws of heredity 2
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Comparable traits in pea plants 3
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Monohybrid Cross Cross-pollination between two pure breeding plants which differ in a single trait (single gene) 4
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F1 of Monohybrid Cross 5
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F2 of Monohybrid Cross 6
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Recessive vs. dominant traits Each plant of the F1 generation contains 2 types of the same trait 7
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Recessive vs. dominant traits Recessive trait - trait NOT expressed in the F1 generation Dominant trait - trait expressed in the F1 generation 8
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Phenotype Physical appearance of a trait Determined by genotype and environment 9
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Genotype The genetic make up of an organism (types of genes) Determined by heredity A pair of homologous chromosomes A gene locus A pair of alleles Three pairs of genes 10
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How many genes in F1? F1 - 2 genes for flower color Purple gene was expressed and white gene was not 11
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Allele Alternative form of a gene Arise by mutation 12
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Alleles 13
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This note was uploaded on 11/01/2010 for the course BIO 110 taught by Professor Drazkiewicz during the Fall '09 term at San Mateo Colleges.

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IntroBio-09 - Mendelian Genetics - Mendelian Genetics 1...

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