Quick test (15 minutes) Sex determination and the occurrence of twins in human beings Answer the following question. 1. Compare the characteristics given and complete the…

Slide 1Plant Hormones Anjali More University of Arkansas Slide 2 Why do plants need hormones? Hormones enable plants to: Respond to environmental factors and changes Direct…

1.Synthesis of proteins. Posttranslational modifications of proteins. Regulation of gene expression. Department of Biochemistry Faculty of Medicine (E.T.) 2011 2. Translation…

Slide 1 VIROLOGY (viruses and non-chromosomal genetic elements) VIRAL GENETICS Slide 2 Mutation types : Biochemical characterization phenotypic expression MUTATION FREQUENCIES…

Slide 1Chapter 12 Section 4 Mutations Slide 2 Mutations DNA contains the code of instructions for cells. Sometimes, an error occurs when the code is copied. - Such errors…

Slide 1 Positive selection A new allele (mutant) confers some increase in the fitness of the organism Selection acts to favour this allele Also called adaptive selection…

Slide 1 25 February, 2005 Chapter 10 Gene Mutation: Origins and Repair Processes GAATTC  GTATTC A  a Slide 2 Overview Mutation changes one allelic form to another and…

Slide 1 Please write your field of dissertation on the blank sheet Slide 2 Cancer: Genes and pathways Slide 3 Cancer: A genetic disease Three main responsible genes: –…

Last lesson we looked at: What is the definition of a gene? Last lesson we looked at: How many nucleotide bases code for each amino acid? And we looked at: What is a mutation?…

MUTATIONS Changes in DNA that affect genetic information. The ultimate source of variation in individuals. What Causes Mutations? There are two ways in which DNA can become…