Molecular Genetics, cell divisions, ecology, selection

Hi Students,

Below are a few links I found very useful in understanding concepts in Molecular Biology and genetics. Difficult concepts in cell division are also dealt with.

Ecology, bioaccumulation and bio-magnification are also dealt with in the powerpoints slideshows listed below.

(1) http://www.slideshare.net/msthomas79/genetics-3177596?from=share_email

(2) http://www.slideshare.net/orodina/nucleic-acids?from=share_email

(3) http://www.slideshare.net/chalkie28/gcse-inheritance-and-selection?from=share_email

(4) http://www.slideshare.net/boo5000/unit-1-ecology-powerpoint-goal-5?from=share_email

(5) http://www.slideshare.net/MrJewett/biomagnification-bioaccumulation2?from=share_email

(6) http://www.slideshare.net/walajtys/biology-chapter-13-genetic-engineering?from=share_email

(7) http://www.slideshare.net/maxedmond/dna-strucutre-and-replication?from=share_email

(8) http://www.slideshare.net/msthomas79/genetic-engineering-3177598?from=share_email

I will go through these slideshows in class. You may want to browse through them for better understanding.

Cheers

Meet the super cow and the featherless chicken

Hi,





Arnold Schwarzenegger, a body builder with real rippling muscles grown by exercising regularly.



Creating a super beef cattle has been the dream of farmers ever since he started farming and animal husbandry.

Artificial selection or selective breeding methods have been used to create better and better breeds of animals for meat and transport purposes.

Meet the super cow, also called Arnold Schwarzenegger cow in this video.Artificial selection in this breed, called the Belgian Blue, took more than 100 years. A defective gene (mutant gene that arose spontaneously) was identified. This gene does not regulate the usual muscle growth. This resulted in "double muscle cell growth" resulting in a super cow which is all lean meat.

Sperms from this mutant was collected and used for artificial insemination.Very weird but true.

Are you ready for the featherless chicken? These chicken were also produced by selective breeding/cross breeding farmers intent on breeding new farm animals which have special advantages. The bird looks like it just walked away from the supermarket shelves!



Cheers