Lesson Overview Lesson Overview Other Patterns of Inheritance Lesson Overview 11.3 Other Patterns of Inheritance.

Slides:



Advertisements
Similar presentations
11.3 Other Patterns of Inheritance
Advertisements

Complex Patterns of Inheritance
Incomplete Dominance & Codominance
Genetics. History Genetics is the study of genes. Genetics is the study of genes. Inheritance is how traits/characteristics, are passed on from generation.
Mendel wondered if genes that determine different traits affect one another. He did an experiment to find out. Mendel found that the gene for seed shape.
Independent Assortment
Genetics Notes Who is Gregor Mendel? Principle of Independent Assortment – Inheritance of one trait has no effect on the inheritance of another trait “Father.
Unit: Mendelian Genetics. For example: ◦ Some alleles are neither dominant nor recessive. ◦ In most organisms, the majority of genes have more than two.
 Independent Assortment- Genes that segregate (separately) independently do not influence each other's inheritance.  The principle of independent.
Chapter 11: Introduction to Genetics
Lesson Overview Lesson Overview Other Patterns of Inheritance THINK ABOUT IT Mendel’s principles offer a set of rules with which to predict various patterns.
Exceptions to Mendel’s Principles: Incomplete Dominance Codominance Multiple Alleles Sex -Linked Disorders.
11.3 Other Patterns of Inheritance
Objectives 11.3 Other Patterns of Inheritance
Genetics. Heredity Passing of genetic traits from parent to offspring Gregor Mendel discovered the principles of heredity while studying pea plants (“Father.
Beyond Dominant and Recessive Alleles Other forms of inheritance.
Beyond Dominant and Recessive Alleles. Incomplete Dominance: when neither allele is completely dominant over the other. · Results in the heterozygous.
Incomplete Dominance & Codominance Section 11-3 in Book.
Genetics: Incomplete Dominance & Codominance Biology 12.
Lesson Overview Lesson Overview Other Patterns of Inheritance Lesson Overview 11.3 Other Patterns of Inheritance.
Beyond Dominant and Recessive Alleles. There are important exceptions to Mendel’s discoveries Not all genes show simple patterns of dominant and recessive.
Monohybrid Crosses Other Crosses I Other Crosses II Random
EXCEPTIONS TO THE RULES. REVIEW OF MENDEL’S PRINCIPLES Genes are passed parents  offspring; get one allele from each parent.
Probability and Heredity What is the difference between phenotype and genotype? What is the difference between homozygous and heterozygous?
Exceptions to Mendel’s Laws: Co-dominance Incomplete Dominance Multiple Alleles.
 In incomplete dominance, if you cross a pink flower (RW) with another white flower (WW), what is the resulting genotypic ratio?  1:1.
11-3: Exploring Mendelian Genetics Objectives:  Explain the principle of independent assortment.  Describe the inheritance patterns that exist aside.
TEKS 6F: Predict possible outcomes of various genetic combinations such as monohybrid crosses, dihybrid crosses, and non-Mendelian inheritance. How are.
Lesson Overview Lesson Overview Other Patterns of Inheritance -Describe the other patterns of inheritance. -Explain the relationship between genes and.
Co-dominance, Incomplete Dominance, Polygenic Traits, and Multiple Alleles More about Mendel:: The Principle of Independent Assortment: genes for different.
POINT > Review some genetics vocabulary POINT > Define genotype and phenotype POINT > Define homozygous and heterozygous POINT > Use a Punnett Square.
Intro to Genetics What is an allele? –one of the alternative forms of a gene that governs a characteristic, such as hair color.
Beyond Dominant and Recessive Alleles. There are important exceptions to Mendel’s discoveries Not all genes show simple patterns of dominant and recessive.
Incomplete Dominance Neither allele is dominant over the other
11.3 Other Patterns of Inheritance
11-2 Probability and Punnett Squares
4.2 Probability and Genetics
Non-Mendelian Genetics
Other Patterns of Inheritance
Incomplete Dominance & Codominance
Genetics Notes Who is Gregor Mendel? “Father of Genetics”
Other Patterns of Inheritance (11.3)
Single Factor Punnett Squares
11.3 Other Patterns of Inheritance
11.3 Other Patterns of Inheritance
Beyond Dominant and Recessive Alleles
11.3 Other Patterns of Inheritance
11-3 Exploring Mendelian Genetics
Incomplete Dominance Incomplete Dominance: The heterozygous genotype produces a phenoytype that falls in between the dominant trait and the recessive trait.
Incomplete Dominance & Codominance
11.3 Other Patterns of Inheritance
11.3 Other Patterns of Inheritance
What are incomplete dominance and codominance?
Incomplete Dominance & Codominance
Genetics Notes Who is Gregor Mendel? “Father of Genetics”
Complex Inheritance Some alleles are neither recessive or dominant, and many traits are controlled by multiple alleles or multiple genes.
Genetics: Incomplete Dominance & Codominance
11.3 Other Patterns of Inheritance
11.3 Other Patterns of Inheritance
11.3 Other Patterns of Inheritance
Incomplete Dominance & Codominance
Incomplete Dominance Incomplete Dominance: The heterozygous genotype produces a phenotype that falls in between the dominant trait and the recessive trait.
11.3 Other Patterns of Inheritance
11.3 Other Patterns of Inheritance
Incomplete Dominance & Codominance
Chapter 7 Bingo.
11.3 Other Patterns of Inheritance
Problems.
Genetics Notes Who is Gregor Mendel? “Father of Genetics”
Genetics Notes Who is Gregor Mendel? “Father of Genetics”
Presentation transcript:

Lesson Overview Lesson Overview Other Patterns of Inheritance Lesson Overview 11.3 Other Patterns of Inheritance

Lesson Overview Lesson Overview Other Patterns of Inheritance February 20th E.Q. What are the other inheritance patterns and how do we predict their outcome probabilities? Bell-Ringer: An albino man marries a normally pigmented woman. Her father was normally pigmented and her mother was an albino. Use C = normal and c = albino. Assume C is completely dominant to c. 1. What is the genotype of the man? 2. What is the genotype of the woman? 3. Can we determine the genotypes of the mother and father of the woman?

Lesson Overview Lesson Overview Other Patterns of Inheritance Cc Normal Cc Normal Cc Normal Cc Normal Cc Normal Cc Normal cc Albino cc Albino c c c c CCCC CcCc

Lesson Overview Lesson Overview Other Patterns of Inheritance White Board Review Rules: 1. We will begin when you are sitting quietly. 2. You will have 10 seconds to answer each question on your board. 3. Do NOT raise boards until I say so. 4. No phone a friend, this is to test yourself not the person next to you :]

Lesson Overview Lesson Overview Other Patterns of Inheritance Question 1 What is the name of an allele that is hidden (or masked) by another allele?

Lesson Overview Lesson Overview Other Patterns of Inheritance Question 2 What do we call in individual’s genotype if they have two DIFFERENT alleles for a specific gene?

Lesson Overview Lesson Overview Other Patterns of Inheritance Question 3 What do we call an individual’s genotype if they have two of the SAME alleles for a specific gene?

Lesson Overview Lesson Overview Other Patterns of Inheritance Question 4 What do we call the allele that is always expressed? (not masked)

Lesson Overview Lesson Overview Other Patterns of Inheritance Question 5 What do we call the sequence of DNA that codes for a specific trait?

Lesson Overview Lesson Overview Other Patterns of Inheritance Question 6 TRUE or FALSE. A punnett square shows the ACTUAL results of a genetic cross?

Lesson Overview Lesson Overview Other Patterns of Inheritance Beyond Dominant and Recessive Alleles What are some exceptions to Mendel’s principles? Some alleles are neither dominant nor recessive.

Lesson Overview Lesson Overview Other Patterns of Inheritance Incomplete Dominance A cross between two four o’clock plants shows a common exception to Mendel’s principles. The F 1 generation produced by a cross between red-flowered (RR) and white-flowered (WW) plants consists of pink-colored flowers (RW), as shown.

Lesson Overview Lesson Overview Other Patterns of Inheritance Incomplete Dominance In this case, neither allele is dominant. Cases in which one allele is not completely dominant over another are called incomplete dominance. In incomplete dominance, the heterozygous phenotype lies somewhere between the two homozygous phenotypes.

Lesson Overview Lesson Overview Other Patterns of Inheritance Codominance Cases in which the phenotypes produced by both alleles are clearly expressed are called codominance. For example, in certain varieties of chicken, the allele for black feathers is codominant with the allele for white feathers. Heterozygous chickens have a color described as “erminette,” speckled with black and white feathers.

Lesson Overview Lesson Overview Other Patterns of Inheritance Example problem The type of hair in humans is incompletely dominant. Curly hair is the homozygous dominant condition. Wavy hair is the heterozygous condition. The homozygous recessive condition results in straight hair. Cross a straight haired man with a wavy haired woman. What will the genotypes and phenotypes of their offspring be?

Lesson Overview Lesson Overview Other Patterns of Inheritance Example problem The spots on a cow are the result of a codominant relationship between the allele for brown fur color and white fur color. Cross a spotted fur cow with a white fur cow. What will the genotypic and phenotypic ratios of their offspring be?