In a fruit fly experiment, two gray-bodied fruit flies produce mostly gray-bodied offspring, but some of the offspring have black bodies. if there are 280 offspring, how many will you predict will have grey bodies and how many will have black bodies? how many of the 280 offspring do you predict will be heterozygous

25% will have black bodies. 50% will be heterozygous. Basically the only way you could have black is if it was recessive and both of the parents were heterozygous, Gg. Grey is dominant, with GG and Gg both producing grey. Black is recessive and will ony occurs with the genotype gg. 25% of 280 is 70, so 70 will be gg, homozygous black. 50% will be Gg, heterozygous grey, which would be 140. The last 70 will be the last 25%, and they will be GG, homozygous grey. So overall 70 will be black and 210 will be grey :)

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.