Tay-Sachs is a recessive genetic disease in humans. If one parent is homozygous normal and the other is a carrier (heterozygous), what are the chances that their child will have this disease?

In horses, black coat (B) is dominant over brown coat (b), and being a trotter (T) is dominant over being a pacer (t). A black horse who is a pacer is crossed with a brown horse who is a trotter. The offspring is a brown pacer. What is the genotype of the brown trotter parent?

A woman who can roll her tongue (presumably dominant) is married to a man who cannot. Two of their four children can roll their tongues and two cannot. If A = roll tongue and a = cannot roll tongue, then what are the genotypes of the parents? 

Which of the following is the process by which species not closely related may come to resemble one another if they live in a similar environment:

The branch of systematic biology that assigns organisms to specific classifications (domain, phyla, class etc.) is called:

In lab you looked at wet mounts of cells like the ones shown above. What kind of cells are shown above? 

The figure shows the pattern of an agarose gel electrophoresis after the DNA from a crime scene was isolated and cut with AccI restriction enzyme. Two individuals have been identified as suspects.    The DNA of which individual(s) was/were found at the crime scene?

What is the correct chronological order of events in the cells in the figure above?       

Along with listening, ________ is the primary method of absorbing new ideas and information in college.

Which of the following is considered a formal note-taking format with key ideas represented by Roman numerals?