Genes that are located on the sex chromosomes are sex-linked genes. In mammals, individuals with two X chromosomes, an XX genotype, are females. Individuals.

Slides:

Advertisements

Similar presentations

Blood Group Notes.

Advertisements

Unit 6 Genetics: the science of heredity

Two copies of each autosomal gene affect phenotype.

Two copies of each autosomal gene affect phenotype.

Section 7.1: Chromosomes and Phenotype

Notes: Types of Inheritance

Incomplete dominance This is when neither allele is dominant.

Incomplete Dominance, Codominance and Sex-Linked Traits

Continuing Genetics DOMINANCE Unit 5: Mendelian Genetics

Mendelian Genetics Part II. Dihybrid Crosses A cross involving 2 traits. Law of Independent Assortment: Genes for different traits can segregate independently.

Sex Linked Traits Humans have 23 pairs of chromosomes.

Codominance and Sex-linked traits. CODOMINANCE 2 alleles are dominant and both are expressed Most common examples are blood type and flower color.

Unit 5 – Genetics Other forms of inheritance Not all traits are simply dominant or recessive, with only 2 possible alleles.

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

Mendel’s Laws of Heredity

Sex-linked Traits. Sex Determination  Sex chromosomes – determines the sex of an individual YY XX  Males have X and Y  Two kinds of gametes  Female.

Can heredity follow different rules?

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

7.1 Chromosomes and Phenotype KEY CONCEPT The chromosomes on which genes are located can affect the expression of traits.

Warm Up 2/11 Sit with your baby partner.

Human Genetics Chapter 7 1. The Role of Chromosomes A. Chromosome number 1.Each human sperm/egg has 23 chromosomes 2.Each human body cell has 23 pairs.

Variations to Inheritance Exceptions to Mendel’s Laws.

Genetics Keystone Review. Terms You Need To Know Gene- sequence of DNA that codes for a protein and thus determines a trait Trait- a characteristic that.

1 GENETICS UNIT STUDY GUIDE. 2 The passing of traits from parents to offspring is known as heredity.

Sex Chromosomes.

Genetics. Gregor Mendel: Father of Genetics Genetics: study of heredity Heredity: passing traits from parent to offspring Used peas to study heredity.

MORE GENETICS VOCABULARY & EXAMPLES

Monohybrid Crosses These crosses involve one pair of contrasting traits. There are 5 different types which we will discuss.

REVIEW GENETICS- the study of heredity. Inheritance Traits are specific characteristics inherited from parents Genes are the factors that determine traits.

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

Probability, Heredity and Punnett Squares. Coin Toss I call “Heads” What are my chances that I win?

Unit 5 – Other forms of inheritance Not all traits are simply dominant or recessive, with only 2 possible alleles.

7.4 Human Genetics and Pedigrees Bell Work. 7.4 Human Genetics and Pedigrees Bell Work.

Unit 5 – Genetics Other forms of inheritance Not all traits are simply dominant or recessive, with only 2 possible alleles.

11.2 Assessment Answers.

 In incomplete dominance, if you cross a pink flower (RW) with another white flower (WW), what is the resulting genotypic ratio?  1:1.

OTHER PATTERNS OF INHERITANCE

Warm Up Turn in Aliens. Pick Up Warm Up. Pick Up Simple Genetics Practice Problems.

A. Heredity: The passing of traits (characters) from parents to offspring B. Genetics: The branch of biology that studies heredity. 1. Gregor Mendel:

Say What!?!?. One allele is not completely dominant over the other. - heterozygous phenotype always intermediate Ex. A cross between a recessive white.

Review of Patterns of Inheritance Gregor Mendel’s Principles 1. Principle of Dominance 2. Law of Segregation – each parent has 2 alleles for a trait but.

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

Probability  The principles of probability can be used to predict the outcomes of genetic crosses  Think of probability like flipping a coin. If you.

Sex-LINKED GENETICS.

Blood Group Notes.

Look at the Parent and F1 generation above

Non Mendelian Genetics Foldable

Genetics Jeopardy!.

Understanding Inheritance

Punnett Squares: Part 2.

Punnett Squares: Part 2.

Genetics and Heredity 9 Biology.

Complex Patterns of Inheritance

Patterns of Inheritance

OTHER PATTERNS OF INHERITANCE

Genetics Power point number 2.

Modes of inheritance There are more modes of inheritance than simple dominant-recessive with only 2 alleles.

Sex-Linked Traits Most traits are controlled by at least 2 genes, one on each homologue The exception are traits controlled by genes on the sex chromosomes.

Lesson 5: Exceptions to Mendelian Genetics

Complex Patterns of Inheritance

Chapter 7 Bingo.

How are traits passed from one generation to the next?

(Where did you get your genes?)

Non Mendelian Genetics

Genetics Chapters 6 and 7.

Looking at incomplete and codominance

Presentation transcript:

Genes that are located on the sex chromosomes are sex-linked genes. In mammals, individuals with two X chromosomes, an XX genotype, are females. Individuals with one X and one Y, an XY genotype, are males. The father’s gametes determines the sex of an organism. Some genetic disorders are sex-linked such as Duchenne Muscular Dystrophy, Hemophilia, and color blindness

Occurs when a heterozygous phenotype is somewhere between the two homozygous phenotypes. Neither allele is completely dominant or recessive. Ex: When plants that are homozygous for red flowers are crossed with plants that are homozygous for white flowers, the offspring have pink flowers.

Occurs when both alleles of a gene are expressed completely, neither allele is dominant or recessive (so both traits are fully expressed). Ex: A plant that is homozygous for red flowers is crossed with a plant that is homozygous for white flowers. The offspring will have some red areas and some white areas.

Polygenic traits are traits produced by two or more genes. Ex: Human skin color is a result of four genes that interact to produce a continuous range of colors. Ex: Three genes determine eye color.