MBG 2400 Study Guide - Final Guide: Mendelian Inheritance, Chromosome, Polyploid

• School: University of Guelph
• Department: Molecular Biology and Genetics
• Course: MBG 2400
• Professor: Andy Robinson

Document Summary

Each gene controls different character or trait. One allele is dominant and one is recessive. Monohybrid is phenotype 3:1 and genotype 1:2:1, dihybrid isphenotype 9:3:3:1. Test cross ratio is 1:1 for mono, 1:1:1:1 for di: assumptions for 3:1 and 9:3:3:1 ratios with (exceptions). True dominance and recessiveness (codominance, incomplete, lethal, multiple alleles) Each gene does not interact with other genes (epistasis) Two copies of each gene in genome (hemizygosity, gametophyte, polyploidy) Genes are found in nuclear genome (cytoplasmic/extranuclear inheritance) Inherited same way regardless of parent (imprinting: define inter and intra allelic action l5 s6. Complementary: at least one dominant allele from each of two genes; 9:7. Recessive epistasis: homozygous recessive at one locus masks second locus; 9:3:4. Dominant epistasis: dominant allele at one locus masks other locus; 12:3:1. Occurs in sex linked traits, genetically engineered plants using foreign gene, deletion of allele resulting in pseudo dominance: describe polyploidy. L6 s11 (expanded 12-14: describe allopolyploids l6 s15-16.