Nhyl Pascua 3/22/2015 Period 4 Codominance Essential Question Why do offspring have different phenotypes from their parents or siblings? A Purpose Explore codominance by investigating the inheritance of sickle cell disease within a family. B Introduction Codominant alleles are both expressed in a persons phenotype.A heterozyygous will have the traits associated with both alleles.In this lab‚you will explore codominance by analyzing the results for the sickle cell disease within a family C Background
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I. Codominance in Humans A. Codominance is the phenotypes of both homozygotes are produced in the heterozygote. 1. Ex: sickle-cell disease II. Sickle-cell disease A. Homozygous for sickle-cell allele. B. Oxygen-carrying protein hemoglobin differs by one amino acid from normal hemoglobin. C. Defective hemoglobin forms crystal-like structures that change the shape of the red blood cells. D. Normal red bloods cells are disc-shaped‚ but abnormal red blood cells are sickle-shaped or half- moon. E
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Lesson 6.2: True or False Name___________________ Class______________ Date________ Write true if the statement is true or false if the statement is false. T 1. The rules of probability apply to genetics. T 2. If an individual has a Gg genotype‚ half of his gametes should have the G allele‚ and the other half should have the g allele. F 3. A Punnett square is a chart that allows you to easily determine the expected genotypes in the offspring of two parents. (expected percents) T 4. In a cross between
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phenotype and genotype of offspring ○ complete dominance ○ incomplete dominance ○ codominance ○ sexlinked ○ polygenic ★ Apply our knowledge of genetics/punnet squares to blood types Genetics Practice Problems (He/Ho‚ dominant/recessive (on paper) Punnet Square Genetics Problems Complete Dominance (on paper) Sponge Bob genetics practice problems (on paper) Face Lab (on paper) Genetic Crosses: Incomplete Dominance‚ Codominance (on paper) Blood Typing Practice (on paper) SexLinked Traits Practice (on
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Biology Test- Chapter 11: Introduction to Genetics Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination. 2. Offspring that result from crosses between true-breeding parents with different traits a. are true-breeding. b. make up the F2 generation. c. make up the parental generation. d. are called hybrids. 3. The chemical
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Biology: Concepts and Connections‚ 6e (Campbell) Chapter 9 Patterns of Inheritance Multiple-Choice Questions 1) Which of the following statements regarding domestic dogs is false? A) Dogs originated in East Asia. B) Dogs of different breeds can be identified through genetic analysis. C) Shar-pei and Akita are genetically very similar to the wolf. D) All dogs are descended from wolves. E) Humans have bred dogs for thousands of years. Answer: D Topic: Opening Essay Skill:
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the inheritance of two traits Genetics Key Terms Continued Independent assortment: alleles of different genes separate independently of one another Incomplete dominance: A heterozygous phenotype that is a blend of the two homozygous phenotypes Codominance: A heterozygous phenotype that equally expresses the traits from both phenotypes Polygenic traits: A trait that is produced by two or more genes Sex-linked traits: A trait that is located on a sex chromosome Exceptions to Mendel’s Rules “Biology
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somatic cells - gamete - autosomes - 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
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but i’m only going to talk about 5 because Mr.O said there would be no polygenetics so there is: Complete Dominance‚ Incomplete Dominance‚ Codominance‚ Multiple Alleles and Sex Linked Traits. Complete Dominance is when there is one allele and two possibilities you either get the phenotype or you don’t‚ in this pattern of inheritance there are of course recessive and dominant alleles. In incomplete dominance and Codominance three possibilities can be found‚ there are no dominant or recessive alleles found and a distinct mixing can be found between the genes
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Homework #24 (130222): Chapter 14 (due Friday 130222) Total points: 20 for Attempt on all questions ONE Concept Map: 10 points Objectives Gregor Mendel’s Discoveries 1. Explain how Mendel’s particulate mechanism differed from the blending theory of inheritance. • Blending: parents genes mixed • Particulate: parents genes still retain identity\ The blending theory was that genetic material contributed by the two parents mixes in a manner analogous to the way blue and yellow make green
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