'Phenotypic ratios' diaporamas de présentation

Continuity Through Heredity

Continuity Through Heredity. Chapter 8. Heredity : the transmission of genetic information from one generation to the next. Genes:. Provide continuity between generations that is essential for life.

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Di-Hybrid Crosses

Di-Hybrid Crosses. When two traits are involved in a cross, it is called a di-hybrid cross. Di-Hybrid Crosses. If you want to make a cross of two traits on the same chromosome; you would now need a 4 X 4 square with 16 different possible offspring.

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Basic Mendelian Crosses

Basic Mendelian Crosses. Purebreeding Parents. 1. Basic Mendelian Crosses. Testcross. 2. Basic Mendelian Crosses. F1 x F1 Cross. 3. Forked Line (Branch) Diagrams. Gametes possible from AaBbccDd individual. 4. Forked-Line (Branch) Diagrams. Phenotypes possible from cross:

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Fundamentals of Genetics

Fundamentals of Genetics. Chapter 9. Heredity : the transmission of genetic information from one generation to the next. Genes:. Provide continuity between generations that is essential for life.

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CHAPTER 14 NOTES Multiple Alleles and Polygenic Traits

CHAPTER 14 NOTES Multiple Alleles and Polygenic Traits. Multiple Alleles: when more than two different alleles exist for the same trait. (Remember: each individual will only have two alleles for a trait but there are several alleles to choose from.).

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Genetics Practice Problems

Genetics Practice Problems. Ratios. 1. What would be the genotypic and phenotypic ratios be for a cross between a true-breeding tall pea plant and a true-breeding short pea plant?. 2. What would be the phenotypic ratio be for the following cross: Tt x tt.

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Modifications to Mendelian Inheritance I. Allelic, Genic, and Environmental Interactions

Modifications to Mendelian Inheritance I. Allelic, Genic, and Environmental Interactions. Modifications to Mendelian Inheritance I. Allelic, Genic, and Environmental Interactions A. Overview: The effect of a gene is influenced at three levels:

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Patterns of Heredity

Patterns of Heredity. Many inherited traits are much more complex then the simple Mendelian rules. - Most genes are not simply dominant or recessive . Incomplete Dominance = . the phenotype of the heterozygous form is a mix of the dominant and recessive genes.

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C. Interlocular Interactions: 1. Quantitative (Polygenic) Traits:

C. Interlocular Interactions: 1. Quantitative (Polygenic) Traits: There may be several genes that produce the same protein product; and the phenotype is the ADDITIVE sum of these multiple genes. Creates continuously variable traits.

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Punnett Squares & Probability

Punnett Squares & Probability. How to figure out what the probable outcome of a genetic cross will be. I. Punnett Squares. Vocabulary 1. Genotype = genetic makeup, what the genes say (EX: BB) 2. Phenotype = physical appearance, how it looks (Color) 3. Genotypic ratio =

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Extensions to Mendel: Complexities in Relating Genotype to Phenotype

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Dihybrid Crosses

Dihybrid Crosses. Crosses involving two traits. Dihybrid Crosses. Constructing a Punnett square for a dihybrid cross is similar to the method used for a monohybrid cross First, determine the alleles produced in the gametes of each parent Next, construct a Punnett square

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Punnett Squares; #3 & #4

Punnett Squares; #3 & #4. #3 Silkworms Copy the parts in RED. Dominant gene: yellow cocoon (C) Recessive gene: white cocoon (c). #3 Silkworms. Cross a homozygous dominant worm with a homozygous recessive worm. 1. Show your work punnett square.

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Dihybrid Punnett Squares

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Dihybrid Punnett Squares

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Incomplete Dominance

Incomplete Dominance. With a snapdragon example. Incomplete Dominance. When two traits both show up . It appears as a blending of the two. Ex. Snapdragons. In snapdragons, the red flower color, (W) is incompletely dominant over white, (w).

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