Question

What do does the degree of symmetry in 2D:4D finger length ratios indicate? Select one: o a. If a man has asymmetrical 2D:4D finger length ratios, that means he's likely attracted to other men. o b. It is a strong indication of whether or not a man has older brothers o c. It indicates the level of testosterone a fetus was exposed to during gestation. o d. If a man has symmetrical 2D:4D finger length ratios, he's likely attracted to women. Which of the following is not a way in sex is determined in animals? Select one: a. By genes b. By temperature o c. By the social environment d. All of the above are ways in which sex is determined What is the dependent variable or measure in an experiment? Select one: a. What you are manipulating o b. What you are measuring c. The method you used to choose your subjects d. The magnitude of the effect that your manipulation produces in the experimental group An embryo is chromosomally XY, but lacks a functional copy of SRY. Will this embryo develop fully functional testes? Select one: a. Yes b. No

Answer 1

2D:4D is the ratio of lengths of index and ring fingers.

Its ratio depends on levels of testosterone exposed to fetus. High testosterone means greater length of ring finger, and ratio is less than 1. This happens generally in males.

Females generally have smaller ring fingers as they were exposed to lower testosterone levels in fetus.