Complex Patterns of Inheritance

Slides:

Advertisements

Similar presentations

12.2 Complex patterns of inheritance. Complex patterns of inheritance Mendel’s experiments show simple inheritance with recessive and dominant alleles.

Advertisements

Exceptions to Mendel’s laws. 1) Incomplete dominance Some alleles are not completely dominant and the offspring will have a “blending” of the parents.

 Not all traits are simply inherited by dominant and recessive alleles (Mendelian Genetics). In some traits, neither allele is dominant or many alleles.

PATTERNS OF HEREDITY AND HUMAN GENETICS

PATTERNS OF INHERITANCE. What type of inheritance pattern is represented?

Mendel performed cross-pollination in pea plants.

12-4 Beyond Medelian Genetics. Alleles are the possible “options” for a trait.

Non-Mendellian Traits What happens when its not all dominant ?

11.3 Other Patterns of Inheritance

WHEN HEREDITY FOLLOWS DIFFERENT RULES

COMPLEX PATTERNS OF INHERITANCE Exceptions to Mendel’s Laws.

Variations to Inheritance Exceptions to Mendel’s Laws.

Objectives 11.3 Other Patterns of Inheritance

C. Beyond Dominant and Recessive Alleles 1. Incomplete Dominance a. One allele is not completely dominant over another b. The heterozygous phenotype is.

Beyond Dominant and Recessive Alleles Other forms of inheritance.

Incomplete Dominance & Codominance Section 11-3 in Book.

Dominance and Multiple Allele Notes

Mendelian Inheritance

Chapter 7 Extending Mendelian Genetics. Karyotype = picture of all chromos in cell They can show a change in chromos whether autosomal or sex-linked.

Inheritance. Types of Inheritance Dominant-recessive – What we have been doing – One allele is dominant, one is recessive If dominant is present, it is.

NOTES: 11.3 Exceptions to Mendelian Genetics! Beyond Dominant and Recessive Alleles ● Some alleles are neither dominant nor recessive, and many traits.

Complex Methods of Inheritance. Incomplete Dominance No gene is completely dominant resulting in a third phenotype. The third phenotype is usually a mixture.

11.2 Assessment Answers.

Chapter 12 When Heredity Rules are Different. Complex Patterns of Heredity Most traits are not simply dominant or recessive Incomplete dominance: when.

Incomplete and Codominance. Simple Inheritance Mendel studied simple patterns of inheritance. Mendel studied simple patterns of inheritance. Found that.

Complex Patterns of Inheritance. 1.Incomplete dominance 2.Codominance 3.Multiple alleles 4.Sex linked inheritance 5.Polygenic inheritance.

 Not all traits are simply inherited by dominant and recessive alleles (Mendelian Genetics). In some traits, neither allele is dominant or many alleles.

Complex Patterns of Inheritance There are some exceptions to Mendel’s Laws.

 A Punnett square shows the possible outcomes of a cross, but it can also be used to calculate the probability of each outcome.  Probability is the.

Incomplete Dominance Neither allele is dominant over the other

Karyotyping BSC 2010L.

Exceptions to Mendel’s laws

Ch. 9 Complex Inheritance

Different inheritance patterns

Ch. 9 Complex Inheritance

Chapters 6 and 7; Patterns of Heredity

IN 147 Headings Vocabulary Important Info

5.5 Incomplete Dominance a condition in which the alleles are neither dominant nor recessive results in a blending of traits.

Look at the Parent and F1 generation above

Non-Mendelian Genetics

PATTERNS OF INHERITANCE

Headings Vocabulary Important Info

Other Patterns of Inheritance (11.3)

Patterns of Heredity.

Patterns of inheritance

Complex Patterns of Inheritance

Complex Patterns of Inheritance

CHAPTER 12: GENETICS.

Complex Patterns of Inheritance

12.2 Section Objectives – page 315

Patterns of Inheritance

OTHER PATTERNS OF INHERITANCE

NonMendelian Genetics

When Heredity Follows Different Rules

Exceptions to Mendel’s laws

Sec 11.2, Complex Patterns of Inheritance

Exceptions to Mendel’s Discoveries

Gene Expression/ Inheritance Patterns

Complex Patterns of Inheritance

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

Variations of Inheritance Patterns

Genetics! Created by Educational Technology Network

12.4 Beyond Medelian Heredity

The science of heredity Frank Gregorio

Complex Patterns of Inheritance

Variations on Mendel’s Themes

Exceptions to Mendel’s Rule

Beyond Dominant and Recessive Alleles

Presentation transcript:

Complex Patterns of Inheritance Spring 2017

Question Why do some traits exhibit a large number of phenotypes? Answer: Because the traits are controlled by many genes.

Complex Patterns of Inheritance Incomplete Dominance- When neither allele of the parents is completely dominant. The phenotype of the heterozygous offspring is a mix of parents. Example: Red snapdragons x White snapdragons = pink snapdragons

Complex Patterns of Inheritance Codominant alleles- Both alleles show equally Example: black chicken x white chicken => speckled chicken Multiple alleles- There are more than two alleles for a genetic trait Example: a rabbit’s coat color- there are four possible colors

Complex Patterns of Inheritance Humans have 23 pairs of chromosomes 22 pairs of homologous chromosomes are called autosomes. The 23rd pair is called the sex chromosomes These are indicated by X for females and Y for males. Sex linked traits- traits that are controlled by genes located on sex chromosomes Example: Color blindness

Complex Patterns of Inheritance Polygenic inheritance- Inheritance pattern of a trait that is controlled by two or more genes Example: Skin color and height *Nutrition, light chemicals, infectious agents such as bacteria, fungi, parasites and viruses can all influence how genes are expressed.