There are three basic steps in creating genetically modified organisms. Arrange these steps in the correct sequence.
(a.) Introduction of the identified DNA into the host
(b.) Maintenance of introduced DNA in the host and transfer of the DNA to its progeny
(c.) Identification of DNA with desirable genes

Options

A. a `rarr` b `rarr` c
B. b `rarr` c `rarr` a
C. c `rarr` b `rarr` a
D. c `rarr` a `rarr` b

Answer

To arrange the three basic steps in creating genetically modified organisms (GMOs) in the correct sequence, we can follow this logical progression:

### Step-by-Step Solution:

1. **Identification of DNA with Desirable Genes (C)**:
- The first step in creating a GMO is to identify the DNA that contains the desirable genes. This involves selecting a source organism that has the traits you want to introduce into your host organism. For example, if you want to improve drought resistance and yield in sugarcane, you would look for a plant species that exhibits these traits.

2. **Introduction of the Identified DNA into the Host (A)**:
- After identifying the desirable DNA, the next step is to introduce this DNA into the host organism. This is typically done using a vector, such as a plasmid, which carries the desired DNA into the host cells. The introduction allows the host to incorporate the new genetic material.

3. **Maintenance of Introduced DNA in the Host and Transfer of the DNA to its Progeny (B)**:
- The final step involves ensuring that the introduced DNA is maintained within the host organism and that it is passed on to future generations (progeny). This ensures that the traits conferred by the introduced DNA are stable and can be inherited.

### Final Sequence:
The correct sequence of steps is:
- C: Identification of DNA with desirable genes
- A: Introduction of the identified DNA into the host
- B: Maintenance of introduced DNA in the host and transfer of the DNA to its progeny

Thus, the correct order is **C, A, B**.