Exam 2: Heredity and Prenatal Development

Joshua was born with an inherited disease that blocked the development of an enzyme critical for development.Over time, Joshua has developed profound intellectual challenges.What disorder does Joshua have?

Describe two examples of recessive genetic disorders.

Huntington disease is a fatal, progressive degenerative disorder and a recessive trait.

What would you tell a woman who is concerned about the risks of fetal testing?

Sickle-cell anemia is more common among Caucasian North Americans than minority groups in the North America.

MATCHING -Mitosis

MATCHING -Monozygotic

What type of disorder is phenylketonuria?

Which statement describes the sperm cell before meiosis?

A woman has a greater chance of bearing twins if she has already had a set of twins and if her mother had twins.

Genes are the biochemical materials that regulate the development of traits.

Thalidomide causes major limb deformities during pregnancy.

During the ninth month of pregnancy, the fetus becomes more active, getting ready for the birth process.

Parents' ages have no bearing on the outcome of a pregnancy.

What is a teratogen? Describe two teratogens and their effects on the developing organism.

Which group shares the most similar genetic material?

A woman who thinks she may be pregnant is concerned that she may have syphilis.Which of the following would you tell her?

Children with PKU will develop normally if they are placed on a special diet.What does their special diet exclude?

According to the textbook, what can pregnant women expect about their weight gain during pregnancy?

What is the cause of sickle-cell anemia?