Exam 7: Development and Sex Determination

The limb deformities caused by the tranquilizer ____________________ helped focus attention on the issue of teratogens.

In the male reproductive system, the vas deferens is connected to the urethra by a short tube called the ____________________.

The lower neck of the uterus, which opens into the vagina, is called the ____________________.

The embryonic genital tubercle that develops into part of the penis in male fetuses develops into the ____________________ in female fetuses.

What is the function of polar bodies?

Explain how X inactivation can result in female mosaicism.

The phenotypic sex of a child depends on

The fusion of male and female gametes usually occurs in the upper third of the vagina.

Typically, blastocyst implantation in the uterus takes place at day ___.

Think about this: It has been proven absolutely that a certain chemical can never pass through the placenta from the mother's circulation into the fetus's circulation. Is it still possible for this chemical to be a teratogen? Why or why not?

The part of the male reproductive system where sperm complete fertilization is the

DHT is less important in the fetal stage than at puberty.

Distinguish between sex determination and sex differentiation.

Teratogens affect the ____ more than any other part of the fetal body.

Implantation of an embryo normally has occurred by how long after fertilization?

The duct between a testis and a seminal vesicle is the ____________________.

The phenotypic sex depends most directly on

The result of X inactivation is ____________________ between the sexes.

X inactivation can lead to ____________________ in females.