PPT-Homologous and Analagous Structures

Comparative Morphology Analogous Structures Structures with similar function but different internal structure development bird wing and insect wings dolphin fin and shark fin Does NOT show evolutionary relationships. Homologous Structures (flowers). Broccoli and Cauliflower evolved from Mustard. print. Homology: A Bouquet of Broccoli One wouldn't normally munch on a rosebud or snap off a dandelion flower for a quick snack. But in fact, in terms of homologies, when you eat broccoli or cauliflower, you are doing just that. Although not scented or suitable for centerpieces, the green tips of broccoli and the white tips of cauliflower are actually flowers. Through many generations of artificial selection, farmers modified the bright yellow blooms of the wild mustard plant into the edible, vegetal plant parts you'll find nestled next to the ranch dip on the hors d'oeuvre tray. . IMSS . BIOLOGY . . ~. . . SUMMER . 2011. LEARNING TARGETS. To understand that biological evolution . involves . descent with modification. . To explain and give different types of evidence for the key concept of biological evolution: all life shares a common ancestor.. presented by. Dr . Hadeel. F. Gad. Leishmania . and Mycobacterium TB share many similarities in their pathogenesis and both pathogens are macrophage parasites. . Furthermore, . co-infection by the two pathogens is not uncommon in clinical practice in East Africa and in other parts of the world (Sati 1942; el-Safi et al. 1995; Khalil et al. 1998, . Erica, . Nao. , Christian and Justine. What are Homologous Structures? . Structures derived . from a common . ancestor or . same . evolutionary or . developmental . origin. May not perform . the same function but they share a common ancestral origin. . presented by. Dr . Hadeel. F. Gad. Leishmania . and Mycobacterium TB share many similarities in their pathogenesis and both pathogens are macrophage parasites. . Furthermore, . co-infection by the two pathogens is not uncommon in clinical practice in East Africa and in other parts of the world (Sati 1942; el-Safi et al. 1995; Khalil et al. 1998, . Alexei Fedorov. Recombination is an intrinsic property of nucleic acids and these molecules are susceptible to joining their ends. .. Evolution invented thousands of proteins that assist DNA recombination and became crucial for cell functioning. . Lecture 65 – Lecture 66. Evidence of Evolution. Ozgur. . Unal. 1. Support for Evolution. 2. The. theory of evolution states that all organisms on Earth have descended from a common ancestor.. The theory explains the existing data and suggests further areas for experimentation.. A hypothetical trace of evolution. One original common ancestor. Scientists use both morphology and genetics to produce phylogenic trees. Morphology- share similar physical characteristics. Analysis of genetic similarity. (5) . Webquest. Comparative anatomy. provides . evidence of evolution . because it shows that various organisms share a common ancestor.. http://. cyemae.wordpress.com. /evolution-of-man/. H. omologous structures. Fossil evidence for evolution. Most evidence of evolution was originally found in fossils. Fossils can preserve the structure of organisms in sedimentary rock if conditions are just right. . One area of evidence of evolution is embryology, the study of embryos. When we compare embryos we can see shared characteristics of organisms throughout their developmental process. . http://slideplayer.com/slide/5286365/. Frayer. model. Quiz, answer sheets, amoeba sister video and . answer sheet. Warm Up. Chromosome Review:. Meiosis. In meiosis gametes or sex cells (egg and sperm) are made .. Homologous structures. Human Arm . Bat Wing . Whale Flipper. . Analogous. Structures . Similar functions but NOT structurally related. . Insects are arthropods and birds are vertebrates. . The wing of a bird and the wing of a butterfly are examples of . R. ecombination. 2. . Site-Specific . R. ecombination. 3. DNA . Transposition. Homologous Recombination at the Molecular Level. DNA BREAKS ARE COMMON AND INITIATE RECOMBINATION. Recombination repair DNA breaks by retrieving sequence information from undamaged DNA. Advanced Higher Biology. Miss A Aitken. National 5 Re-Cap. Haploid: One set of chromosomes – 23 . All gametes (sex cells – sperm and egg) are haploid. Diploid: Two sets of chromosomes – 46 (or 23 pairs).