Exam 27: Reproduction and Embryonic Development

Hermaphrodites are animals that

What would happen if the chorion failed to secrete human chorionic gonadotropin?

Which of the following options correctly lists the three stages of labor in the order in which they occur?

At which gestational age does a developing human fetus first look obviously human and not like other vertebrate embryos?

After being produced in the testes, sperm mature further in a structure called the

Two important contributions that cleavage makes to development are to

At the end of gastrulation, the ectoderm makes up the

After reading the paragraph below, answer the questions that follow. Brittany's family includes several individuals with a genetic disorder that affects primarily males. Her husband Tony has no history of the disease. They have decided that their best chance to have a healthy family is to have only daughters. Through a new type of assisted reproductive technology, it is possible to separate sperm that will produce sons from those that will produce daughters. Brittany's eggs will be fertilized by in vitro fertilization (IVF) with sperm that can produce only daughters. The developing female embryo can be implanted into her uterus to complete development normally. -The daughter-producing sperm used to fertilize Brittany's eggs should be

A vasectomy is a form of male sterilization in which each vas deferens is cut, but most of the male's reproductive physiology remains intact. Which of the following will not continue to occur in a male who has had a vasectomy?

Research indicates that ________ respond(s)to ________ signals that inform a cell about its position relative to other cells in the embryo.

Another term for gestation is

Cells migrate from one place to another during gastrulation using

Which of the following options correctly lists the sequence in which most animals develop?

Which of the following STDs is caused by a virus that can also cause cancer?

An advantage of human testes being positioned in an external sac rather than in the abdominal cavity is that

A pregnant woman goes to her obstetrician for her first ultrasound. After the exam is over, the doctor remarks, "It looks like the ribs are still developing, and I might even have seen some tiny fingers and toes." How many weeks pregnant is this woman?

The function of a sperm cell's acrosome is to

When a chemical signal from a group of embryonic cells causes a different, nearby group of cells to embark on a particular developmental course (say, differentiating into a leg), the interaction between the two groups of cells is called

The human egg is swept through the oviduct toward the uterus by

Which of the following structures develops from mesodermal tissue?