This is a model of one molecule of an element. Use the model for questions 16-20.
(Note: all neutrons, protons, and electrons
are showing in the drawing. None are hidden
from the eye.)

16. How many electrons does this
element have?
17. How many protons does this
element have?
18. How many neutrons does this element have?
19. How many electrons are in the second level?
20. What is the atomic number of this element?

Suppose a particular species of tulip plant has three alleles for the gene that codes for flower color. the cr allele produces red tulips, the cp allele produces purple tulips, and the cw allele produces white tulips. cr is dominant over cp and cw, and cp is dominant over cw. for each of the following crosses, determine the expected ratio of offspring for each flower color. cr cp x cp cw cr cw x cp cw 1 red: 1 purple : 0 white, 1 red: 2 purple: 1 white, 2 red: 1 purple 1 white, 1 red: 3 purple : 0 white, 2 red: 0 purple : 2 white, 2 red: 2 purple : 0 white