The karyotype for trisomy 21 illustrates an example of a genetic mutation caused by

Which letters can be used to model Mendel's cross of true-breeding tall plants with true-breeding short plants in a Punnett square?

Alpha particles are the most penetrating. true or false

In a group of tomato plants, some individuals have red fruit and others have yellow fruit. In this group, the gene for the fruit color trait has two alleles. The allele for yellow fruit (f) is recessive to the allele for red fruit (F).

As a general rule, viruses are not considered to be alive. One reason is that some viruses use RNA as their genetic material. Which of the five biological themes does this violate? Briefly explain why.

Which of these is the strongest evidence that all organisms on Earth evolved from a common ancestor? A. Many species have body parts with homologous structures B. The fossil record shows an example of every organism that ever lived C.

Which of these was the dominant plant group at the time that dinosaurs were the dominant animals? a. bryophytes b. charophyceans c. angiosperms d. gymnosperms e. seedless vascular plants

Why did the normal force not enter into your solution?

A grass starts with 30,000 kJ of energy. How much energy would a cheetah acquire after it ate a zebra that consumed the grass? 30 kJ 300 kJ 3,000 kJ 30,000 kJ

When s. marcescens, a bacterium, is grown in a refrigerator, it produces red-colored colonies. however, if the bacterium is grown at room temperature, the colonies are white. the best explanation for this situation is that?

A researcher is studying coat color in mice. Wild-type fur in mice is brown. Three pure-breeding strains of mice with white fur have been isolated. The strains are called milky, blanc, and weiss. White fur is a recessive trait in each strain.