Chapter 7: Extending Mendalian Genetics

Autosomal Disorders

Interactive tutorial about the causes, inheritance, diagnosis, and treatment of cystic fibrosis, a genetic disorder caused by recessive autosomal alleles

http://www.ygyh.org/cf/whatisit.htm

(Main Idea: Two copies of each autosomal gene affect phenotype.)

 

 

Sex Determination

Simulation in which you select and combine gametes to produce male and female offspring and to see how sex-linked traits are inherited

http://www2.edc.org/weblabs/SexDetermination/sexdetermination.html

(Main Idea: Males and females can differ in sex-linked traits.)

 

 

Inheritance of Traits

Click on What is a trait? to watch an animation about complex patterns of inheritance.

http://learn.genetics.utah.edu/content/inheritance/traits/

(Main Ideas: Phenotype can depend on interactions of alleles. Many genes may interact to produce one trait. The environment interacts with genotype.)

 

 

Incomplete Dominance

Simulation in which you perform crosses with peas, snapdragons, and lentil plants to learn the difference between dominance, incomplete dominance, and codominance

http://www2.edc.org/weblabs/IncompleteDom/IncompleteDominanceMenu.html

http://www2.edc.org/weblabs/IncompleteDom/IncompleteDominanceMenu.html

(Main Idea: Phenotype can depend on interactions of alleles.)

 

 

Gene Linkage and Mapping

Animated tutorial explaining how Sturtevant and Morgan used chromosomal crossovers to create linkage maps

http://www.dnalc.org/view/16280-Animation-11-Genes-get-shuffled-when-chromosomes-exchange-pieces-.html

(Main Ideas: Gene linkage was explained through fruit flies. Linkage maps estimate distances between genes.)

 

 

Human Traits

Click on Observable Traits for a slideshow discussing the role of inheritance in several

http://learn.genetics.utah.edu/content/inheritance/observable/

(Main Idea: Human genetics follows the patterns seen in other organisms.)

 

 

Sex-Linked Disorders

Animated tutorial explaining how hemophilia, a sex-linked genetic disorder, was passed through the English royal family

http://www.dnalc.org/view/16315-Animation-13-Mendelian-laws-apply-to-human-beings-.html

(Main Ideas: Human genetics follows the patterns seen in other organisms. Females can carry sex-linked disorders. A pedigree is a chart for tracing genes in a family.)

 

 

Pedigrees

Game in which you drag and drop symbols to create pedigrees for human traits

http://www.zerobio.com/drag_gr11/pedigree11_flash.htm

(Main Idea: A pedigree is a chart for tracing genes in a family.)

 

 

Karyotype

Simulation in which you match up chromosome pairs to make a human karyotype

http://learn.genetics.utah.edu/content/begin/traits/karyotype/

(Main Idea: Several methods help map human chromosomes.)