In mendel's monohybrid cross of a purebred
white-flowered plant and a purebred
purple-flowered plant, the f generation
.a. showed only the dominant trait.
.b. showed only the recessive trait.
.c. did not receive any recessive alleles.
.d. remained purebred.

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.