All cells use ___________ as the genetic material of inheritance.

Hemophilia is a sex-linked recessive trait. Imagine a case of a woman who is not a hemophiliac (she has normal blood clotting), but her father was a hemophiliac. She marries a man who is also not a hemophiliac. What is the probability for their children of being hemophiliacs?

Which of the following would have the greatest impact on a cell and its offspring?

In bacteria, the lac operon is maximally expressed when …

The Okazaki fragments of the lagging strand of DNA replication are joined together by this enzyme:

In comparative anatomy, structures that are anatomically similar because of descent with modification from a common ancestor are called:

Until the 19th century, all peppered moths (Biston betularia) observed around Manchester, England, were light in color. In 1845, a single black peppered moth was reported. As Manchester became more industrialized, the frequency of black moths increased greatly. The change in proportion of light and dark forms most likely resulted from:

In translation, the _________ of a tRNA molecule will bind to the codon of an mRNA molecule.

Which line of evidence developed since the time of Darwin has strengthened support for his theory of natural selection?

In bacteria, presence of the amino acid tryptophan represses expression of the trp operon because tryptophan binds to the …