Exam 21: Human Development and Genetics

Homologous chromosomes are a pair of chromosomes that may also be called ____________________ and ____________________.

The hormone that causes strong contractions of the uterus during labor is:

During the first stage of labor, the ____________________ dilates, and the ____________________ ruptures.

After birth, the ____________________ in the baby's heart is closed, which helps increase ____________________ circulation.

The umbilical arteries carry blood from the ____________________ to the ____________________.

Which of the following statements are true of genes and chromosomes? (Read carefully and select all of the correct statements.)

Genetics problem: Mom is heterozygous for type A blood and Dad is homozygous for type B blood. The chance that their child will have type A blood is:

In the placenta:

For people, curly hair is dominant and straight hair is recessive. Genetics problem: Mom has straight hair and Dad is homozygous for curly hair. The chance that their child will have curly hair is:

During pregnancy, the hormones that prepare the mammary glands for lactation are ____________________ and ____________________.

A person who has two similar genes for a particular trait is said to be:

Genetics problem: Dad is red-green color-blind, and Mom is not a carrier. The percent chance that a son will NOT be color-blind is ____________________ and that a daughter will NOT be a carrier is ____________________.

The portion of the blastocyst that contains the potential embryo is the:

For the embryo, the amnion:

A person who is heterozygous for a particular trait has two ____________________ genes for it.

The embryonic membrane that forms the first blood cells is the:

After birth, the baby's ____________________ constricts, which prevents blood from flowing into the aorta and thereby allows more blood to flow to the ____________________.

A person who has two different genes for a particular trait is said to be ____________________ for that trait.

The genetic code for one protein is called a ____________________.

During pregnancy, the placental hormones that inhibit ovulation are ____________________ and ____________________.