K.C.S.E Biology Q & A - MODEL 2017PP1QN16
The following are text messages on a celiphone that represent gene mutation.
(a) Identify the type of gene mutation represented in each case
(b) State Mendel’s First Law.
(c) State two disadvantages of genetically modified plant products.
a. I — Deletion;
b. The characteristics /traits of an organism are determined by internal factors/ genes (which occur in pairs). Only one of the genes can be carried in a gamete/ passed onto the next generation;
c. Most have lost most of the original (desirable) qualities e.g taste;
Poor/undesirable qualities are perpetuated through subsequent generations;
Products’ qualities are irreversible- can’t get original species/qualities;