Modes of Inheritance Biology Mrs. Harper 1/25/18.

Slides:

Advertisements

Similar presentations

KEY CONCEPT Phenotype is affected by many different factors.

Advertisements

Complex Patterns of Inheritance

Mendelian Exceptions Chapter 12 Section 4.

Incomplete dominance This is when neither allele is dominant.

Genetics Chapters 9-1 & 9-2. Incomplete dominance There is no dominant allele or recessive allele The 2 alleles are blended and make up a new physical.

Advanced Genetics.

Incomplete Dominance Incomplete Dominance: The heterozygous genotype produces a phenoytype that falls in between the dominant trait and the recessive trait.

Modes of Inheritance Exceptions to Mendel’s Principles.

11.3 Other Patterns of Inheritance

Variations to Inheritance Exceptions to Mendel’s Laws.

Topic: Genetics Aim: Describe multiple alleles and explain the inheritance of blood types. Do Now: Review HW: Ditto – Reproductive Systems Review (BOTH.

Incomplete Dominance Codominance Multiple Alleles

Incomplete Dominance & Codominance Section 11-3 in Book.

BEYOND MENDEL’S LAWS Heredity. Incomplete Dominance Review:  Inherited traits were either dominant or recessive  The dominant allele in an individual.

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 Codominance Multiple Alleles

EXCEPTIONS TO THE RULES. REVIEW OF MENDEL’S PRINCIPLES Genes are passed parents  offspring; get one allele from each parent.

Incomplete or Co-Dominant?!?!. Normally traits have one dominant allele and one recessive allele…. What happens when an allele for a trait isn’t completely.

Beyond Dominant and Recessive Alleles. The whole story... Not all phenotypes are dictated by dominant and recessive alleles (in fact, very few are). Some.

Mendelian Exceptions Chapter 11 Section 3. Mendel’s Principles Revisited Inheritance of biological _____________ is determined by individual units known.

What is Codominance?.

Incomplete Dominance: The heterozygous genotype produces a phenoytype that falls in between the dominant trait and the recessive trait. Incomplete Dominance.

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

Genetics Test Review Mrs. Callan Biology 2017.

Beyond Mendelian Genetics

Mendelian Exceptions.

Codominance Notes Mrs. Callan 2017.

Bell Work 1/19 Hemophilia is a sex-linked, recessive trait. Which of the following describes the probability of hemophilia in the offspring of a man who.

Exceptions to Basic Mendelian Rules (complex inheritance)

Non-Mendelian Genetics

Mendelian Exceptions.

Chapter 11 The Work of Gregor Mendel Working with Punnett Squares

Check In Homework State the name of the following genotypes: AA Aa aa

Exceptions to Basic Mendelian Rules (complex inheritance)

Complex Inheritance Some alleles are neither recessive or dominant, and many traits are controlled by multiple alleles or multiple genes. Codominance.

Incomplete Dominance Codominance Multiple Alleles

Incomplete Dominance & Codominance

Punnett Squares: Part 2.

Incomplete Dominance Incomplete Dominance: The heterozygous genotype produces a phenoytype that falls in between the dominant trait and the recessive trait.

Other Patterns of Inheritance (11.3)

Ex. Red and white flower produce pink offspring

Incomplete Dominance Incomplete Dominance: The heterozygous genotype produces a phenoytype that falls in between the dominant trait and the recessive trait.

Complex Patterns of Inheritance

11.3 Other Patterns of Inheritance

COMPLEX PATTERNS OF HEREDITY

Exceptions to Mendel’s Discoveries

Incomplete Dominance Codominance Multiple Alleles

Gene Expression/ Inheritance Patterns

Incomplete dominance and co-dominance

Incomplete Dominance Incomplete Dominance: The heterozygous genotype produces a phenoytype that falls in between the dominant trait and the recessive trait.

4/11/ 12 Bell Ringer What does incomplete dominance mean?

Incomplete Dominance & Codominance.

11.3 Other Patterns of Inheritance

Incomplete Dominance & Codominance.

Complex Inheritance Some alleles are neither recessive or dominant, and many traits are controlled by multiple alleles or multiple genes.

Incomplete Dominance & Codominance.

Incomplete Dominance Incomplete Dominance: The heterozygous genotype produces a phenotype that falls in between the dominant trait and the recessive trait.

Incomplete Dominance Codominance Multiple Alleles

The Post-Mendel Era Exceptions to Mendel.

Mendelian Exceptions Chapter 11 Section 3.

Incomplete Dominance Codominance Multiple Alleles

Incomplete Dominance Codominance Multiple Alleles

Review: Dominant/Recessive

Incomplete and Codominance

Incomplete Dominance Codominance

3/19/12 Objective: Understand codominance and incomplete dominance

Beyond Dominant and Recessive Alleles

Incomplete Dominance Codominance Multiple Alleles

Incomplete & Co-dominance

Presentation transcript:

Modes of Inheritance Biology Mrs. Harper 1/25/18

January 25, 2018

Do Now 11/17/15

Modes of Inheritance: unique ways to inherit traits FOUR MODES OF INHERITANCE 1. Incomplete Dominance 2. Codominance 3. Multiple Alleles 4. Polygenic Traits

Incomplete Dominance 1. Incomplete dominance is where one allele is not completely dominant over the other allele. 2. If red flowers (RR) were crossed with white flowers (rr) you would think that they would only make red flowers (Rr). The genotypes will be Rr but the flowers will be pink because– the dominance is not complete. 4. ***Heterozygous individuals produce a new phenotype.

Incomplete Dominance Red- RR White – rr Pink- Rr

Codominance 4. In codominance, both alleles express themselves independently in the phenotype. 5. Both alleles contribute to the phenotype of the organism – one isn’t dominant or recessive, they are both expressed. 6. Not all organisms are just one color. Lots of things are spotted, speckled or multiple colors and these use codominant traits.

Codominance

Multiple Alleles 7. This is a type of inheritance that has more than two possible alleles for a trait. 8. Most of the traits that we have looked at have had two alleles: like B or b, T or t. 9. But some traits have more than two alleles – they have multiple alleles. They could have: A, B, or O (for blood type).

Multiple Alleles

Polygenic Traits 10. Polygenic traits are controlled by two or more genes. 11. Polygenic traits often show a wide variety of phenotypes – it isn’t either just black or brown, it could be many colors. 12. Polygenic traits are responsible for the wide range of different skin colors in humans. There are more than 4 different genes that determine this trait.

Which mode of inheritance is this speckled dog?

Which mode of inheritance is variety in skin color?

Which mode of inheritance a new phenotype for heterozygous?

Which mode of inheritance for the diversity in blood types?

Practice Red (R) flowers are dominant to white (r) flowers, but when heterozygous, they produce pink flowers, meaning they are INCOMPLETELY DOMINANT. If a white flower crosses with a pink flower, what percentage of the offspring will be pink?

Practice Genotypes for Type A __________________ Human blood types are determined by genes that follow the CODOMINANCE pattern of inheritance. There are two dominant alleles (A and B) and one recessive allele (O). Genotypes for Type A __________________ Genotypes for Type B________________ Genotypes for Type AB__________________ Genotypes for Type O _____________ AO or AA BO or BB AB OO If my mother is Type A, my father is Type B, can I have Type O?

Practice

Assignment Work on the Modes of Inheritance Worksheet independently on CODE RED. Unfinished classwork is homework I will pass back your quizzes shortly.