Which factors remained constant in each trial? Check all that apply.
A. the total number of people
B. the series of people who exchanged liquids with each other
C. the number of people who were infected at the end of the lab
D. the number of exchanges
E. the number of individuals who were initially infected

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?