* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Non Mendelian Genetics - Warren County Schools
Skewed X-inactivation wikipedia , lookup
History of genetic engineering wikipedia , lookup
Epigenetics of diabetes Type 2 wikipedia , lookup
Nutriepigenomics wikipedia , lookup
Essential gene wikipedia , lookup
Polymorphism (biology) wikipedia , lookup
Genome evolution wikipedia , lookup
Y chromosome wikipedia , lookup
Hardy–Weinberg principle wikipedia , lookup
Gene expression programming wikipedia , lookup
Polycomb Group Proteins and Cancer wikipedia , lookup
Artificial gene synthesis wikipedia , lookup
Ridge (biology) wikipedia , lookup
Minimal genome wikipedia , lookup
Genomic imprinting wikipedia , lookup
X-inactivation wikipedia , lookup
Gene expression profiling wikipedia , lookup
Genome (book) wikipedia , lookup
Microevolution wikipedia , lookup
Biology and consumer behaviour wikipedia , lookup
Epigenetics of human development wikipedia , lookup
Designer baby wikipedia , lookup
Quantitative trait locus wikipedia , lookup
Complex Pa+erns of Heredity Incomplete Dominance • Some traits are neither totally dominant or recessive • Heterozygous offspring inherit a trait that is a blend • Example: red snapdragon x white snapdragon= pink snapdragon Incomplete dominance C-‐ curly hair C -‐ straight hair Genotypes for: Curly? Wavy? Straight? Incomplete Dominance PracIce • Predict the genotypes and phenotypes of offspring created by crossing a blue fish and a yellow fish. Blue is incompletely dominant to yellow. Codominace: Both alleles in a heterozygous match express themselves fully (“C” represents the gene for coat color) CR = red allele for coat color; CW= white allele for coat color In ca+le, red hair is co-‐dominant to white hair. Produces a roan cow that is speckled with white & red. Show the genotypes of the cows below. 5 • • Chickens – black & white feather color is codominant resulIng in a speckled chicken What is the genotype of a “speckled chicken”? 6 – Codominant alleles are neither dominant nor recessive. – The ABO blood types result from codominant alleles. Type of protein in the picture above that helps cells recognize each other is called? MulIple Alleles and Codominance • Many genes have more than two alleles ex. Blood Type IA or IB or i (I= inherit a glycoprotein) (i= don’t inherit a glycoprotein) Type A? Type B? Type AB? Type O? Codominance Problem Example: homozygous male Blood Type B ( ) x heterozygous female Blood Type A ( ) 9 Males and females can differ in sex-‐linked traits. • Genes on sex chromosomes are called sex-‐ linked genes. – Y chromosome genes in mammals are responsible for male characterisIcs. – X chromosome genes in mammals affect many traits Example of Sex-‐Linked Traits InheriIng Sex Linked Traits • Sex Linked Traits are inherited on the X chromosome. • How would a male inherit the gene for colorblindness? • How could a female be colorblind? • Who is more likely to display a colorblind trait? Other Examples: Hemophilia, Baldness, Calico Cats A pedigree is a chart for tracing genes in a family • Phenotypes are used to infer genotypes on a pedigree. • Autosomal genes show different pa+erns on a pedigree than sex-‐linked genes. If the phenotype is more common in males, the gene is likely sex-linked.