A survey that includes only people who choose to respond is susceptible to A. Question-wording bias
B. Voluntary-response bias
C. Coding errors
D. Interviewer-induced bias

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?