Chapter 28 - Development & Genetics

What percentage of sperm cells introduced into the vagina normally reach the oocyte?

The term syngamy refers to the:

How many days after fertilization does implantation of the blastocyst occur?

At day 4 after fertilization, the solid ball of cells that has formed is called the:

Implantation usually occurs in the:

The enzymes that allow implantation to occur are produced by the:

The human gestation period is about:

The chorion develops from the:

The embryonic disc develops from the:

The embryonic period of development covers what time period?

For fertilization to occur, a sperm must penetrate:

The amnion forms from the:

The yolk sac forms from the:

The extraembryonic coelom becomes the:

The “water” referred to when a woman's “water breaks” prior to delivery is:

The endometrium is digested by enzymes released from the:

Exchange of gases, nutrients, and wastes between maternal and fetal blood takes place between the:

The portion of the endometrium that covers the embryo and is located between the embryo and the uterine
cavity is the:

Most materials cross the placenta by:

Deoxygenated fetal blood is carried to the placenta via the:

The reason the corpus luteum is maintained in early pregnancy is to:

Human chorionic gonadotropin is produced by the:

During early pregnancy, the main function of hCG is to:

Human chorionic gonadotropin is at its highest levels during:

Once hCG levels decrease, estrogen and progesterone are secreted mainly by the:

Peak secretion of hCS occurs:

Early pregnancy tests are based on detection of what substance in the urine?

The observable characteristics of a person's genetic makeup are known as the:

An individual whose alleles for a particular trait are the same is said to be:

The two alternative forms of a gene that code for the same trait and are at the same locus on homologous
chromosomes are called:

A person is heterozygous for a particular trait if he/she has:

If a person's phenotype is intermediate between homozygous dominant and homozygous recessive then
inheritance of this trait is an example of:

Most pregnancy tests are based on the presence or absence of:

What would be the possible blood phenotypes of the offspring of parents who are genotype II and I^AI^B?

Inheritance of the ABO blood type is an example of:

How many pairs of autosomes does a normal human have?

A child expresses an autosomal recessive trait. Which of the following are NOT possible genotypes for the parents?