chance of being affected‚ a 50% chance of being unaffected and a carrier‚ and a 25% chance of being unaffected and not a carrier. Once an at-risk sib is known to be unaffected‚ the risk of his/her being a carrier is 2/3”(Strauss). This represents a Monohybrid Cross. [pic]This relates to meiosis and fertilization because the passing of the traits to the four daughter haploid cells from the diploid parents. It happens just as a punnet square one child has a chance of being affected‚ another has
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The convergence in external morphology of sharks‚ penguins‚ and porpoises is attributed to selection pressures that are common to these groups Genes that are located on the same chromosome are all of these An incompletely dominant gene controls the color of chickens so that BB produces black‚ Bb produces a slate-gray color called blue‚ and bb produces splashed white. A second gene controls comb shape‚ with the dominant gene R producing a rose comb and r producing a single comb. If a pure-breeding
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Lab Manual Introductory Biology (Version 1.4) © 2010 eScience Labs‚ LLC All rights reserved www.esciencelabs.com • 888.375.5487 2 Table of Contents: Introduction: Lab 1: The Scientific Method Lab 2: Writing a Lab Report Lab 3: Data Measurement Lab 4: Introduction to the Microscope Biological Processes: Lab 5: The Chemistry of Life Lab 6: Diffusion Lab 7: Osmosis Lab 8: Respiration Lab 9: Enzymes
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Links to pages in the CGP Revision Guide and weblinks Biology Unit B1 - Topic 1 Classification‚ variation and inheritance 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Links Demonstrate an understanding of how biologists classify organisms according to how closely they are related to one another including: a Species – groups of organisms that have many features in common b Genus – contains several species with similar characteristics c Family – comprising of several genera
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fly’s have for distinct stages‚ the egg‚ larva‚ pupa and adult. the egg and larva stages last for eight days‚ the pupal stage last for six days and then the adult stage which last for many weeks this period of growth is called instars. In this lab a dihybrid cross was performed to get data results and to draw a conclusion to the hypothesis. The hypothesis for this experiment is that it will yield a 9:3:3:1 ratio XY‚ Xy‚ xY‚ xy. Which is that 9 out of 16 would have long wings red eyes‚ 3 out of 16
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include 2 GG and 2 Gg‚ the ratio would be: 2 GG : 2 gg (or 1:1 in the reduced form) 3) If your offspring genotypes are 4 gg‚ then the ratio would be written as:: 4 gg When you record phenotypic ratios for a monohybrid cross‚ there are only
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Fruit Fly Lab Alycia Fletcher Biology IB HL March 25th 2010 Fruit Fly Lab Introduction Genes can either be sex-linked or autosomal. If a gene appears mostly in one sex chances are the gene is sex-linked and if it appears frequently in both sexes it is most likely autosomal. Using Drosophila melanogaster‚ also known as the fruit fly‚ we will determine whether the gene is sex-linked or autosomal. Drosophila melanogasters have a relatively short life span and are an excellent organism
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Chromosomal and human inheritance 1. An AABb individual is mated with another AABb individual. The possible number of genetically different kinds of offspring is _____. a. 3 b. 2 c. 9 d. 4 e. 1 2. The most common phenotype in a natural population is referred to as the _____. a. Mutant phenotype b. Wild type c. Liked gene d. Autosome e. Genotype 3. The most common lethal genetic disease in the United States is _____. a. PKU b. Huntington’s disease c. Sickle-cell disease d. Hemophilia e. Cystic fibrosis
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zygote - sex chromosomes - phenotype - karyotype - genotype - eukaryotic cell division - dominant - mitosis - recessive - meiosis - homozygous - heterozygous - incomplete dominance - codominance - pure bred - hybrid - monohybrid cross 2. Make sure you know all there is to know about MITOSIS & MEIOSIS: (Reference: Jacplus Yr 10 Textbook‚ Section 2.4 “Dividing to Multiply”) Study the MITOSIS & MEIOSIS DIAGRAMS in this section. You should be able to tell the DIFFERENCES
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Christian Chou Mrs. McCarron 12/10/14 A.P Biology Drosophila melanogaster Genetics Introduction: The common fruit fly‚ scientifically named Drosophila melanogaster‚ is used by many in genetic studies. Because they can be easily cultured‚ have a relatively short generation time‚ and are prolific breeders‚ fruit flies are often very popular in genetic investigations. Furthermore‚ mutations and sex are easy to visualize among the fruit flies. Male fruit flies have a smaller abdomen than their female counterparts
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