Regarding sexual development, which of the following statements best characterizes what a parent is most likely to see in an ultrasound taken during the first six weeks of prenatal development?
A) A parent will be able to see the early development of a penis for males.
B) A parent will begin to see primitive sexual structures, starting with the scrotum for males and the labia for females.
C) A parent will see primitive genital structures that cannot yet be distinguished as male or female.
D) A parent will see the development of female internal and external genitalia for both males and females.
Question 2
All of the following are true of human sexual differentiation, EXCEPT
A) genetic instructions in the Y chromosome cause deviation from female development.
B) genetic activity on X chromosome cause testes to differentiate.
C) the basic blueprint of the human embryo is female.
D) at about the 7th week, changes occur in external genitalia.
Photograph illustrating the development of a fetus
Embryo and fetal development during weeks 1–25 of gestation.
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Tornado Formation: Nonsupercell Tornado Development
Sexual Scripts