Shown in the diagram are homologous chromosomes during prophase i of meiosis. which of the following describes the process shown? a. a mutation occurred in which the dna content of the gene is altered. b. segregation of sister chromatids has occurred. c. alleles have condensed and segregated. d. crossing-over, in which alleles are exchanged, has occurred.

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.