A fruit fly of genotype a+/a . b+/b (parent 1) is crossed to another fruit fly of genotype a/a . b/b (parent 2). The progeny of this cross were: Genotype / Number of individuals a+/a . b+/b / 15 a/a . b/b / 12 a+/a . b/b / 34 a/a . b+/b / 39 The original arrangement of alleles in parent 1 would have been what?

wheres the answers ?

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers

answer; ///animal spirits;