What has more concentration?

Local anesthetics types: shorter duration of action

The chemical bond that mediates base pairing of DNA is 

In Drosophila melanogaster, a gene for eye color is located on the X chromosome. The allele for red eyes (X^R) is dominant over the allele for white eyes (X^r). A female fruit fly with the genotype X^R X^r is crossed with a male with the genotype X^R Y. What proportion of their male offspring would you expect to have white eyes?

In forward genetics, mutant phenotypes are studied to identify the underlying genes responsible for those phenotypes.

Histone Deacetylation relaxes the chromatin, thus increasing transcriptional activity.

In Caenorhabditis elegans, the establishment of cell polarity during early embryonic development is critical for proper cell division and differentiation. Which of the following statements correctly describes the role of PAR proteins in this process?

Which of the following is NOT a major obstacle in cloning dinosaurs?

What is the primary role of the bicoid gene in Drosophila early embryogenesis?  

The mosaic color pattern of the Calico cats, a condition known as “tortoiseshell” is a result of dosage compensation. Name the genetic mechanism, including the non-coding RNA involved. You may use drawing to illustrate your point.