quick way of inducing scenescence is by the application of 
ABA ie Abscissic acid which is a growth inhibitor.

The name of the recently proclaimed ?athletic gene? is 
ACTN3. This gene, located at 11q13-q14, is responsible for 
the production of alpha actinin-3 (OMIM, 2004). Actinin-3 
is found in fast-twitch (type 2) muscles and is believed to 
allow muscles the ability to generate a greater amount of 
force at higher velocities of movement. 

In words that even the most unintelligent sports fan could 
understand: this gene allows you to run faster, jump 
higher, and hit harder. Actinin-3 is a part of a family of 
actin-binding proteins and is related to dystrophin. There 
are two different genes located in the human body that are 
able to produce actinin. 

ACTN3 is one and the other is ACTN2. Unlike ACTN3, the 
presence of ACTN2 is found universally in all skeletal 
muscle, not just type 2. In all the research surrounding 
ACTN3 a strong connection could not be made to show that 
any dependency existed between the functions of ACTN3 and 
ACTN2.

Pharmacogenomics is a combined study of Medicine and 
genomics. Pharmacogenomics is a science that examines the 
inherited variations in genes that dictate drug response 
and explores the ways these variations can be used to 
predict whether a patient will have a good response to a 
drug, a bad response to a drug, or no response at all.

No,environment does not affect genes.