Question
Biology Question on Applications of Biotechnology
Genetic engineered male sterile crop plants may be produced by inserting
A
Bt toxin gene
B
barnase gene
C
lectin gene
D
chitinase gene
Answer
barnase gene
Explanation
Solution
Genetic engineered male sterile crop plants are obtained by inserting barnase gene in front of promoter of plant gene that has tapetum specific expression. Barnase protein expressed is a extracellular RNase that degenerates tapetum in Pollen Mother Cells (PMCs) making them sterile.