Natural selection acts on populations through a specific trait. Which statement must be true about that trait? 1. The trait is the same for all organisms. 2. The trait has little impact on survival.
3. The trait is resistant to mutations.
4. The trait is passed on genetically to the next generation.

Some steps in cell division are shown below: 1. chromosomes condense and pair up 2. segments of dna of sister chromatids twist and cross 3. exchange of dna occurs between chromosomes 4. four daughter cells are created that are haploid which of the following steps is least likely to occur during meiosis 1?