Which chemical damages the protective ozone layer? A. Greenhouse gases
B. Carbon dioxide
C. Nitrogen
D. Chlorofluorocarbons

Afruit fly population has a gene with two alleles, a1 and a2. tests show that 70% of the gametes produced in the population contain the a1 allele. if the population is in hardy-weinberg equilibrium, what proportion of the flies carry both a1 and a2? a) 0.49b) 0.7c) 0.42d) 0.21