Which enzyme joins the paired sticky ends of DNA fragments to seal a cloning vector with its foreign DNA?

In humans, aniridia, a type of blindness, is due to a dominant gene A.  Migraine headaches are due to another dominant gene M, which is on a different chromosome.  A man who suffers from both conditions (AaMm) marries a woman who suffers from both (AaMm). What are the chances of an offspring having both aniridia and migraine headaches?

Tall stem is dominant over dwarf stem in peas.  If a homozygous tall plant is crossed with dwarf plant, what will be the ratio of the offspring?

Identify Part I in Figure 5 below:

How can RNA be distinguished from DNA?

Are structures are found in prokaryotic cells except:

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 purple stems and yellow fruit?  

How many carbon dioxide molecules are needed to make one glucose molecule?

Identify structure 3 (the dark structure inside structure 8).

How many nucleotide bases in mRNA code for a single amino acid?