Human Heredity and Development_Walsh_Date_032310

Human Heredity and Development_Walsh_Date_032310 - Human...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
March 23, 2010 Professor Walsh Pedigree Analysis Pedigrees are symbolic representations of family relationships and inheritance of a trait. Connect mating pairs and number kids in order of birth. Twins share a line, identical twins have an extra line; generation is numbered with roman numerals. Shaded in boxes/circles are affected individuals. Familiarize yourself with shapes and lines in a pedigree Variations from Mendel Alleles can interact in ways other than dominant/recessive o Incomplete dominance - the expression of a phenotype that is intermediate to those of the parents; a blend or mixture. Ex. Red and white flowers made pink flowers pink crossed with pink actually came out to be a ratio of 1 red: 2 pink: 1 white. It wasn’t a blend after all which gave incomplete dominance. The heterozygote is in-between the dominant and recessive trait. Ex. Red flowers - R¹R¹ x White flowers - R²R² = R¹R² Human examples – May sometimes depend on the phenotype examined
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/30/2010 for the course BISC 105 taught by Professor Patriciawalsh during the Spring '10 term at University of Delaware.

Page1 / 3

Human Heredity and Development_Walsh_Date_032310 - Human...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online