Chapter 14 Figures PDF
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This document contains diagrams and explanations related to inheritance patterns in genetics, such as monohybrid and dihybrid crosses, test crosses, and various other concepts like allele and homologous chromosomes, and incomplete dominance.
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Chapter 14 Figures You have 2 alleles for each gene at the homologous chromosomes Enzyme C T A A A T C G G T Allele for G A T T T A G C C A purple flowers Enzyme t...
Chapter 14 Figures You have 2 alleles for each gene at the homologous chromosomes Enzyme C T A A A T C G G T Allele for G A T T T A G C C A purple flowers Enzyme that CTAAATCGGT helps synthesize purple pigment Pair of Locus for flower- homologous color gene chromosomes Allele for Absence One allele white flowers of enzyme results in A T A A A T C G G T sufficient T A T T T A G C C A pigment. ATAAATCGGT Monohybrid Experiment Monohybrid Experiment F2-generation Genotypic ratio Phenotypic ratio Technique × Test Cross Dominant phenotype, unknown genotype: Recessive phenotype, known genotype: PP or Pp? pp Predictions If purple-flowered or If purple-flowered parent is PP: parent is Pp: Sperm Sperm p p p p P P Pp Pp Pp Pp Eggs Eggs P p Pp Pp pp pp Results or All offspring purple 1 2 offspring purple and 1 2 offspring white Experiment YYRR yyrr Dihybrid P Generation Gametes YR × yr Experiment F1 Generation YyRr Predictions Hypothesis of Hypothesis of dependent assortment independent assortment or Sperm Predicted 1 1 1 1 Sperm 4 YR 4 Yr 4 yR 4 yr offspring of F2 generation 1 1 2 YR 2 yr 1 YR 4 YYRR YYRr YyRR YyRr 1 2 YR YYRR YyRr 1 Yr Eggs 4 YYRr YYrr YyRr Yyrr 1 yr Eggs 2 YyRr yyrr 1 yR 4 YyRR YyRr yyRR yyRr 3 1 4 4 1 yr 4 Phenotypic ratio 3:1 YyRr Yyrr yyRr yyrr 9 3 3 1 16 16 16 16 Phenotypic ratio 9:3:3:1 Results 315 108 101 32 Phenotypic ratio approximately 9:3:3:1 Incomplete dominance Multiple alleles F1 is intermediate More than 2 alleles for the gene in population Snapdragon flower Blood groups ABO system Polygenic inheritance Epistasis More than one gene control the character Gene affect the expression of another gene Human skin pigmentation Labradors coat color Quantitative characters Environmental effect and Multifactorial characters (a) Hydrangeas grown in (b) Hydrangeas of the same basic soil genetic variety grown in acidic soil with free aluminum
