ANS 217 Lecture Notes - Lecture 6: Nitrogenous Base, Heredity, William Bateson
12 Feb 2013
School
Department
Course
Professor
Document Summary
With large enough sample size: independent assortment: different traits are passed to offspring without regard to any other trait. 9:3:3:1 ratio: punnet square, trait must be completely dominant. But these only produce 4 distinct morphologies. Mendel could only observe morphology : triple heterozygous cross. 27 genotypes and 8 phenotypes out of 64 births! Many masked genes due to heterozygous dominant genes. Achieved numerous accomplishments in poultry breeding and management. Lady mcduff layed 303 in one year (1911) Oregona layed 1188 eggs in 5 yrs. Published his work from this study in 1913. An animal"s physical size relates to the number of chromosomes it contains: no, male vs. female, same amt of info, different shapes. Human karyotypes: not a random process, dna condenses in the same way every time (all organisms, not just humans, y chromosome: not many genes on this chromosome, just determines maleness.
