K.C.S.E Biology Q & A - MODEL 2017PP1QN16

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
I 
II  
(b) State Mendel’s First Law. 
(c) State two disadvantages of genetically modified plant products.

answers

​a. I — Deletion; 
II- Inversion; 
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;