What two chromosomes do males have for gender?
(a) x chromosomes
(b) y chromosomes
(c) x and y chromosomes
(d) sperm cells do not contain sex chromosomes

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

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.