would be a monohybrid cross: Rr x Rr => 1/4 RR‚ 1/2 Rr‚ 1/4 rr. 4. In maize‚ a dominant allele A is necessary for seed color‚ as opposed to colorless (a). Another gene has a recessive allele w that results in waxy starch‚ as opposed to normal starch (W). The two genes segregate independently. What are the phenotypes and relative frequencies of offspring from each of the following crosses? Notice: The question specifies phenotypic ratios. a. AaWw x AaWw This is a dihybrid cross:
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Learning Outcome 1. Understand how genetic information is passed from parents to offspring. Assessment Criteria 1.1 Recall the main stages of meiosis and understand the biological significance of the process. ( question 5) 1.2 Understand Monohybrid and Dihybrid Mendelian Inheritance.(question 1‚4) 1.3 Understand co-dominance and sex linkage.(question 2‚3) 1.4 Apply biological principles and concepts in solving genetic variation problems. ( questions 1‚2‚3‚4‚5‚) Achieved Grade Descriptors 1a) Understanding
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Genetics Review DNA (Deoxyribonucleic Acid): Stored inside chromosomes and contain all instructions for life It is made up of Ribose (sugar)‚ phosphate‚ and when of 4 Nitrogenous bases (Adenine‚ Thymine‚ Guanine and Cytosine) A Nucleotide consists of a Phosphate molecule‚ a sugar molecule‚ and a Nitrogenous base pair The nitrogenous bases always pair up AT and CG Each human has 46 chromosomes 23 pairs in total 1 pair sex chromosomes (that define your sex‚ male XX‚ female XY) 22
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MODULE 2: GENETICS‚ VARIATION AND NATURAL SELECTION SPECIFIC OBJECTIVES & EXPLANATORY NOTES 1. Structure and Roles of Nucleic Acids 1.1 illustrate the structure of RNA and DNA using simple labelled diagrams; The genetic substance found in all organisms called DNA or deoxyribonucleic acid is a kind of nucleic acid. Nucleic acids consist of two long polymers of simpler units‚ called nucleotides; that are composed of three (3) main units as shown below: 1) A pentose sugar (deoxyribose
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Mendelian Genetics Introduction In 1865 an Austrian monk‚ Gregor Mendel‚ presented the results of painstaking experiments on the inheritance of the garden pea. Those results were heard‚ but not understood‚ by Mendel’s audience. In 1866‚ Mendel published his results in an obscure German journal. The result of this was that Mendel’s work was ignored and forgotten. Mendel died in 1884 without knowing the pivotal role his work would play in founding the modern discipline of genetics. By 1899‚ some
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mammalian circulatory system Examining slides of liver and kidney Examining slides of Spirogyra‚ Funaria‚ Marchantia‚ Dryopteris and Pinus Investigating the structure of flowers‚ Angiospermatophyta (one monocotyledon and one dicotyledon) Monohybrid and dihybrid crosses and use of χ2 test Construction of a dichotomous key using local specimens Preservation procedure (a) Insects (b) Plants 25 insect species (up to order) 25 plant species (local name and habitat) Ecological study of a terrestrial or
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difference between a monohybrid cross and a dihybrid cross? a.|A monohybrid cross involves a single parent‚ whereas a dihybrid cross involves two parents.| b.|A monohybrid cross produces a single progeny‚ whereas a dihybrid cross produces two progeny.| c.|A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid only one.| d.|A monohybrid cross is performed for one generation‚ whereas a dihybrid cross is performed for two generations.| e.|A monohybrid cross results
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Meghan Methe B-block 11.14.12 Chapter 8 Heredity and Genetic Variation (Objectives) pg. 192-221 Questions: 1. The role of genes in heredity is to carry the traits for the making of DNA. 2. The law of probability says that each chance of probability is equal in the sense of the possible outcomes of the traits present. 4. Dominant masks the recessive which in situations where both trait alleles are present in a gene the organism would be heterozygous and the dominant allele
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the basis of biparental inheritance. homologous chromosomes segregate from one another and assort independently with involving the genetic nature of human traits. 38 KLUGMC03_038-060HR 10/18/06 1:01 PM Page 39 3.2 The Monohybrid Cross Reveals How One Trait Is Transmitted from Generation to Generation 39 science for the next 16 years. Mendel received support from the monastery for his studies and research throughout his life. In 1856‚ Mendel performed his first set of hybridization
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BI 111 Study Guide Exam #1: Some of Ch. 4‚ the brief discussion summarizing Ch. 6‚ and Chptrs. 5‚ 7‚ and 8 HOW TO USE THIS STUDY GUIDE: You should be able to provide fairly detailed answers to the following questions and directions… this means you will probably use more room than is provided by the small spaces between them. Some of those answers will include things I talked about in lecture‚ as well as concepts that are explained by your textbook. You may want to reformat the guide on
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