ET 3 Which of the following best defines a gene pool? A. the sum of all genetic traits in a population's individuals at a given time
B. any movement of genes from one population to another
C. any movement of organisms from one environment to another
D. the random change in the frequency of an allele in a population

Which statement is true about cell differentiation? cell differentiation happens in all cells. results in two new identical daughter cells. causes cells to change type and become specialized. occurs during cell division.

Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false

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