A Bacterium with the Genotype Met⁺his⁺lys^-arg⁺ Has Been Transformed with DNA

question 19

Essay

A bacterium with the genotype met⁺his⁺lys^-arg⁺ has been transformed with DNA from a second bacterium that has the genotype met⁺his^-lys⁺arg^-.
Following the transformation,scientists streaked a sample of a transformed bacterium onto several different plates that contain different nutritional supplements in order to determine the transformant's genotype.Using the results of the experiments (shown below),determine what crossovers occurred to produce the bacterium.On the above diagram,draw the crossovers that are necessary to produce a bacterium that fits the observed growth profile.

---

Definitions:

Resistance

The refusal to accept or comply with something; in a psychological context, it may refer to an individual's unconscious defense mechanisms against certain thoughts or realities.

Exhaustion

A state of extreme physical or mental fatigue, usually resulting from stress or overwork.

Immune Response

The body's defense mechanism against pathogens, including the activation and coordination of white blood cells and the production of antibodies.

Immune System Responses

The reactions of the body's immune system to foreign substances or pathogens to protect the body from disease and infections.