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.
Relationship between HoxC-6 gene expression and neck development.
miRNA function in limb development
Ratings of Perceived Contradictions in Political Statements
Embryo and fetal development during weeks 1–25 of gestation.
Development of Blood Vessels & Blood
Stages of Human Development