PPT-Genetic Change

By C Kohn Agricultural Sciences Waterford WI 1 Species Change The traits of a species are primarily determined by the types of proteins made in its cells All proteins are made from amino acids and different arrangements of amino acids result in different proteins . Natural selection acts on phenotypic variations in populations. Enduring Understanding 1A. Change in genetic makeup of a population over time is evolution. Environments change and act as selective mechanisms on populations.. variation and fitness. Hardy Weinberg law. Assume a . gene . with two . alleles. A and B that occur with frequency p and q = 1-p. . What is the frequency after crossing?. According to the Hardy Weinberg law gene frequencies are constant.. of . adaptation . technologies. Emile Frison, Sp. Representative of the Director General, Bioversity International. Technical Executive Committee, UNFCCC. Bonn, 4 March 20134. How . can . process. Written in the genetic code of species alive today. Story of life on earth is the story of the molecule of life---DNA---and the various ways in which it manifests itself, in the form of living species in order to survive. .. Evolutionary Forces. Mutation (random). Genetic Drift (random). Gene Flow (random). Sexual Selection (non-random). Genetic Drift. Random, non-selective, changes in allele frequency due to chance. . Ms. Cowman. SBI3U. Mutations: The Source of Genetic Variation. All species exhibit genetic variation. Mutations create new genes that provide a continual supply of new genetic information. Mutations may be:. LO 1.5 The student is able to connect evolutionary changes in a population over time to a change in the environment. . SP 7.1 The Student can connect phenomena and models across spatial and temporal scales.. -- biological evolution: the process whereby earth’s life changes over time through changes in the genetic characteristics of populations . -- theory of evolution: all species descended from earlier, ancestral species .  . Unit 11. 7F. Let’s remember…. An allele is an alternative form of one gene . B stands for black b stands for brown. The allele would be…. Genetic Drift. An evolutionary mechanism in which allele frequencies change in a population. NATURE Academy. Pamela Puppo & Jill Hamilton. How do plants adapt to their environment?. What is adaptation?. How do plants adapt to their environment?. What is adaptation?. How do plants adapt to their environment?.  . Antigenic drift. . where individual bases in the DNA or RNA . mutate. to other bases. Most of these . point mutations. are "silent" – they do not change the protein that the gene encodes. . If the enzyme that converts tyrosine to melanin is defective, no melanin is produced and a genetic disease known as albinism results.. A peacock with albinism does not produce the melanin needed to make the bright colors of its feathers.. Learning Goal . Identify the type of change in DNA for a point mutation, a deletion mutation, and an insertion mutation. . Genetic Mutation. A. . mutation. is a change in the nucleotide sequence of DNA.. Topics covered here:. Evolution. Classification. Natural Selection is a major mechanism of evolution. According . to Darwin’s theory of natural selection, competition for . limited resources . results in differential survival. Individuals with more .