In tomato plants, purple stems (P) are dominant to green (p), and red fruit (R)  is dominant to yellow fruit (r). If a heterozygous purple-stemmed, red-fruited plant were self-fertilized, what proportion of the offspring would have green stems and yellow fruit?  

What is a gamete cell?

If one strand of DNA has the base sequence ATCGTT, the complementary strand of that DNA must have the base sequence:

Which is the largest?

If a body cell has 50 chromosomes as the diploid number, how many chromosomes would be in a gamete cell?

Imagine a protein is boiled and loses its 3-dimensional structure.  The unfolded protein cannot perform its function, so it is considered:

An organism that contains foreign DNA from another species is considered all of the following except:

In eukaryotes,  RNA polymerase II enzyme needs transcriptions factors to help it bind the core  ___________ region in order to begin transcription.

A possible explanation to a question or a problem is the:

Structure 1 is the :