What is the molecular/cellular explanation for maternal effect?

When two closely related species (like two salamanders) differ greatly in their total amount of DNA, this is usually due to

In the leading strand, DNA is made in the direction _________ the replication fork and is made as __________.

The most commonly occurring sequence among a group of related sequences is

A codon is 5’-GAU-3’.  An anticodon that would recognize this codon would be

What are the expected results for the Meselson and Stahl experiment after 3 generations (i.e, 3 rounds of DNA replication in the presence of light nitrogen)? Note: during generation zero, the DNA is all heavy, and subsequent generations only make light DNA.

When comparing the yeast genome (a simple eukaryote) to the human genome (a complex eukaryote), why is the human genome larger?

A codon is 5’-CCA-3’.  An anticodon that would recognize this codon would be

The wobble rules for tRNA-mRNA pairing are shown in this quiz. If we assume that the tRNAs do not contain modified bases, what is the minimum number of tRNAs that are needed to recognize all of the proline codons?

A codon that specifies an amino acid near the amino terminus of a polypeptide would be