Dissecting microscope Fly “morgue” (DO NOT DRINK) Table 1: Phenotypes of the parental strains of Drosophila Phenotype Phenotype Wild type: Red eyes‚ normal wings‚ short antennae. Mutant A: Red eyes‚ vestigial wings‚ short antennae. Wild type: Red eyes‚ normal wings‚ short antennae. Mutant B: White eyes‚ normal wings‚
Premium Gene
I stand alone on my usual hill‚ covered in mist the red light of the blood stained moon. A vast ebony cloak made of fraying rags sags on my bony figure. It hangs so low that the bottom lays amongst the decaying grass beneath my lifeless feet. Decorating my cloak is the skulls of my victims. The unravelling hood covers my face but what face you see demands on the illusion i chose for you. Sometimes a face may not appear‚ just a void‚ the passage to hell. It could be the flesh of someone you’d loved
Premium English-language films Human Debut albums
Chapter 15 The chromosomal basis of inheritance Key ideas: 1) Mendelian Inheritance has its physical basis in the behavior of chromosomes during sexual life-cycle. 2) Morgan traced a gene to a specific chromosome. 3) Linked genes tend to be inherited together because they are located on the same gene. 4) Independent assortment of chromosomes and crossing over produce genetic recombinants. 5) Geneticists use recombination data to map a chromosome’s genetic locus. 1900 Biology finally
Premium Chromosome Gene Genetics
Distribution of plants and animals that had a common ancestor to different areas. 2. When in different areas‚ develop different characteristics‚ like snakes in gene flow. C. Anatomy 1. Vestigial structures – Structures which are fully developed in one organism‚ but not used and nonfunctional in another. Ostrich wings‚ human tailbones. 2. Homologous structures – Same bones in different organisms. Embryos are very much alike. D. Biochemical 1. All organisms have similar cell components such as membrane
Free Evolution Charles Darwin Evolutionary biology
2002 AL Biology marking scheme Paper 1 Section A Terms with *‚ mark deduction for wrong spelling. Alternatives and correct answers not listed in this document should be accepted.) Marks 1 .1/2 mark for each correct answer Column 1 E earthworm B jellyfish F starfish D clam 2. (2) Concepts for mark allocation • worn-out organelles are enclosed by membrane forming vacuoles (1) worn-out organelles are enclosed by lysosomes (3) • lysosome releases hydrolytic enzymes into the
Premium Osmosis
by heredity from a structure in most recent common ancestor of species. - Analogous Structures: anatomical structures that have closely related functions but do not derive from the same ancestral structures. (ex. Wings of birds vs. wings of butterflies or insects) - Vestigial Structures: Anatomical structures that seem to fit no function but that resemble structures with functional roles in related organisms. (eyes of moles‚ human coccyx‚ human appendix) - Phylogeny: the relationship
Free Evolution Natural selection Charles Darwin
CHAPTER 22: DESCENT WITH MODIFICATION Questions in This Course How did life on earth become the way it is today? What differences exist among living organisms? What drives biodiversity? How are structures related to function? Life: The Why and the How Ultimate vs. Proximate questions: Ultimate: Why? Why are we here? Why does life exist? Proximate: How? How did we get here? How did life become what it is today? Philosophy and religion—Ultimate questions Science—Proximate questions
Free Evolution Charles Darwin Natural selection
will breed Drosphila melanogaster (fruit flies) and set up genetic crosses in order to determine the pattern of inheritance of certain mutant traits. The traits for which we will examine the pattern of inheritance are apterous (wingless)‚ vestigial (crippled wings) or white eyes. These are all mutant strains. The normal condition (winged and red eyes) is referred to as the wild type strain. Objective: The intial cross mates homozygous mutant fruit flies with homozygous wild type fruit flies in
Premium Allele Zygosity Genetics
ISC Board Important Questions Biology [Set-1] Q1. a) (i). Absorption spectrum and Action spectrum Answer: A curve obtained by plotting the amount of absorption of different wavelengths of light by a particular pigment is called absorption spectrum of that pigment. An action spectrum is a curve showing the effectiveness of different wavelengths of light in stimulating the process being investigated. (ii). Heart Wood and Sap Wood Answer: In most trees the outer light colored region of the wood
Premium Hepatitis
sexual selection stabilizing selection strata vestigial structures Good review questions from the “Testing Your Knowledge” section at the end: #’s 13‚ 14 Exam questions are similar‚ but not exactly like these: One of the major sources of evidence for evolution is in the comparative anatomy of organisms. Features that look different but have similar structural origin are called A. Homologous structures. B. Analogous structures. C. Vestigial structures. D. Equivalent structures. Darwin
Free Evolution Natural selection Population genetics