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Unformatted text preview: Genetics Genetics Gregor Mendel Gregor Mendel garden peas F1 (filial) generation ALL PURPLE ALL PURPLE FLOWERS X
F1 F1 PURPLE AND WHITE FLOWERS!!! WHAT?!?! F2 Hmm… Hmm… This leads me to form some hypotheses… Genes vs. Alleles Genes vs. Alleles Gene = flower color Allele = purple or white Chromosome from Mom Chromosome from Dad Purple Purple flower gene White flower gene Homozygous vs. Heterozygous
Purple Purple flower gene White flower gene P p GENOTYPE PP = homozygous dominant PP = homozygous dominant PHENOTYPE purple Pp = heterozygous purple pp = homozygous recessive
Punnett-square white Mendel’s Principle of Mendel’s Principle of Segregation Gene = tongue rolling Gene = tongue rolling Alleles = rolling and nonrolling GENOTYPE RR = homozygous dominant RR = homozygous dominant PHENOTYPE roller Rr = heterozygous roller rr = homozygous recessive
Punnett-square nonroller Mendel’s Principle of Mendel’s Principle of Independent Assortment Dihybrid cross Dihybrid cross roller nonroller normal ears vulcan ears Probabilities Probabilities Test Cross Test Cross Shingadoodles Shingadoodles
G green eyes g white eyes H have hair h hairless Recessive Disorders Recessive Disorders Albinism Cystic Fibrosis TaySachs disease Dominant Disorders Dominant Disorders Achondroplasia Huntington’s disease Incomplete Dominance Incomplete Dominance Incomplete Dominance Incomplete Dominance Codominance Codominance
Blood Type A B AB O AA, AO BB, BO AB OO Gene Linkage Gene Linkage Gene Linkage Gene Linkage SexLinked Genes SexLinked Genes
XX Female XY Male SexLinked Disorders SexLinked Disorders Redgreen color blindness Hemophilia Pleiotropy Pleiotropy Pleiotropy Pleiotropy Polygenic Inheritance Polygenic Inheritance ...
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This note was uploaded on 11/17/2010 for the course BIO bio 101 taught by Professor C during the Spring '05 term at Diablo Valley College.
- Spring '05