Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Foundations of Genetics
Document related concepts
Saethre–Chotzen syndrome wikipedia , lookup
Epigenetics of human development wikipedia , lookup
Polymorphism (biology) wikipedia , lookup
Neuronal ceroid lipofuscinosis wikipedia , lookup
Genetically modified crops wikipedia , lookup
Heritability of IQ wikipedia , lookup
Gene therapy of the human retina wikipedia , lookup
Human genetic variation wikipedia , lookup
Vectors in gene therapy wikipedia , lookup
Genome evolution wikipedia , lookup
Biology and consumer behaviour wikipedia , lookup
Quantitative trait locus wikipedia , lookup
Genomic imprinting wikipedia , lookup
Therapeutic gene modulation wikipedia , lookup
Gene therapy wikipedia , lookup
Nutriepigenomics wikipedia , lookup
Gene desert wikipedia , lookup
The Selfish Gene wikipedia , lookup
Behavioural genetics wikipedia , lookup
Public health genomics wikipedia , lookup
Site-specific recombinase technology wikipedia , lookup
Genetic engineering wikipedia , lookup
Population genetics wikipedia , lookup
Gene expression profiling wikipedia , lookup
Gene nomenclature wikipedia , lookup
Gene expression programming wikipedia , lookup
Genome (book) wikipedia , lookup
History of genetic engineering wikipedia , lookup
Artificial gene synthesis wikipedia , lookup
Dominance (genetics) wikipedia , lookup
Medical genetics wikipedia , lookup
Transcript
Connect! Where do you get your traits from? What does dominance mean? What controls your traits? Foundations of Genetics Gregor Mendel, an Austrian monk and biologist, is considered the founder of genetics He used math to develop some basic principles of genetics He used pea plants to develop these principles; now fruit flies (Drosophila) are generally used 1. DOMINANCE is when only one of the genes in a pair is expressed The other gene which is not expressed is called recessive. An upper case letter is used to symbolize a dominant gene while a lower case letter symbolizes a recessive gene. For example, in certain pea plants, the gene for tallness (T) is dominant and the gene for shortness (t) is recessive. 2. GENETIC CROSSES are used to show matings of individuals The first step in predicting the possible outcomes of a genetic cross is to determine the genes of the parent generation, if possible. For example, we can show a cross between a tall (TT alleles) and a short (tt alleles) pea plant TT x tt The second step in solving a genetics problem is to make a Punnett square. The parents alleles go on the outside, while the possibilities of the offspring get filled in on the inside. What if two of the tall (Tt) offspring were crossed? Tt x Tt Chunk Time! Who is the founder of genetics? What did he study? Why are fruit flies used now, instead? Explain Mendel’s principle of dominance. What is the gene that is not expressed called? What do upper and lower case symbolize? What do heterozygous and homozygous mean, in terms of letters? Make a Punnett square showing a cross between 2 heterozygous purple flower pea plants. HINT: Purple is dominant over white flower. Does your Punnett Square look like this? Good job, Bob! JFF
