How many alleles exist for a given gene?

Two highly inbred tobacco plants are crossed. One has dark green leaves. The other has yellow leaves. The F1 have light green leaves. Five hundred progeny from F1 * F1 crosses are analyzed.

Two planets are orbiting a star. Planet A is closer to the star than Planet B. Which description explains the expected motion of Planets A and B?

Which gases are released into the atmoshpere when volcanoes erupt

An expectant mother with Type Rh-negative blood is safe to accept negative blood. While they can tolerate taking positive blood they can do it only once.

The lumper potatoes that were grown in Ireland during the 1800s were essentially clones of one another. They all had the same genetic makeup. So, when a potato blight disease began infecting the potatoes, it spread to all potatoes equally.

What are the four types of biomolecules?

Plants appear green because they do not absorb the green wavelengths of light what happens to those green light waves when they hit the plant

The geographical processes that shape earths features today

Researchers working with Rob Dunn set out to collect and identify microbes found in belly buttons. When the researchers began identifying these microbes, they found that the microbes represented a wide range of metabolic activities.

Which of the following facts about the ocean water indicates that the ocean is a major resource of nutrients?