The way genes determine traits with cells is now well understood. This has opened up a new field of study called genetic engineering, through which organisms can be modified or engineered to possess new traits. It is common practice in the field of genetic engineering to remove a gene from one organism and insert it into the genome of another. It is a challenging task, but many examples of genetically modified organisms have been produced in both the plant and animal domains. Since genes from one organism can be inserted into the genome of a completely different organism, which statements below are conclusions that can be made from this observation? Select all that apply.

A. All forms of life have DNA in their nucleus.

B. In cells, traits are the result of proteins, and protein production is controlled by genes.

C. The molecular basis of inheritance is universal in all forms of life.

D. By changing one letter in the genetic code, the entire gene changes.

The kidneys, ureter, bladder, and urethra the body maintain homeostasis through the process of a. excretion b. specialization c. respiration d. digestion

Astudent analyzed ears of corn that demonstrated two traits in the f2 kernels, purple or white colors and smooth on wrinkled shapes. a tabulation of 135 individual kernels gave the following results: purple and smooth = 75 white and smooth = 28 purple and wrinkled = 24 white and wrinkled = 8 what would be the only phenotype present in the f1 ger

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.