Exam 29: Development and Inheritance

During early development,the Y chromosome produces a substance called "testis determining factor" (TDF)that causes the indifferent gonad to become a testis.This would be an example of

The period from 1 month after birth to 1year is known as

How many chromosomes do human gametes contain?

The ________ period extends from birth to 1 month.

The developmental period heralded by the onset of puberty is known as

The gradual modification of anatomical structures during the period from conception to maturity is

Which of the following are recognized classes of abortion?

As a person ages,

The hollow cavity within the blastocyst is the

Figure 29-1 Early Human Development Use Figure 29-1 to answer the following questions: -What is the developmental fate of "9"?

Which of these statements about ectopic pregnancy is false?

Which of the following is not part of oocyte activation?

Figure 29-2 Fetus at 10 Weeks Use Figure 29-2 to answer the following questions: -Identify the structure labeled "2."

The placenta is a source of which of the following hormones?

Polyspermy results in

The outer layer of the blastocyst that can penetrate the endometrium is the

Which of the following is not one of the extraembryonic membranes?

The cell that directly results from the fusion of a secondary oocyte and a spermatozoon is called a(n)

The term ________ refers to the time spent in prenatal development.

During implantation,the