An individual with the blood group genotype iAiB has the phenotype AB. What is the relationship between the iA and iB alleles?

The protein spikes on the surface of a virus:

If guanine makes up 60% of the bases in a DNA double helix, what percent of the bases is adenine?

Use the diagram below to answer the following question. What phase of mitosis is shown below?   

What evidence led to the confirmation that Albert DeSalvo was the Boston Strangler?

Plant viruses ________.

A diploid human cell contains:

Tongue rolling is recessive to no tongue rolling. What is the probability of having a child who cannot roll their tongue when an individual who can roll their tongue mates with an individual heterozygous for tongue rolling? Hint: draw it out using letters of your choice!

When a bacterium reproduces itself and make a genetic replica of itself, it has created a clone.

Nondisjunction might result in gametes with the chromosome numbers ________.