Exam 21: Human Development and Genetics

The placenta is formed by:

In the placenta,oxygen and carbon dioxide move by the process of ____________________.

After birth,the infant's pulmonary circulation is increased because the foramen ovale ____ and the ductus arteriosus ____.

In the gestation period,the period of fetal growth lasts:

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

The sex chromosomes in women are called ____________________ and in men are called ____________________.

The stage of labor during which the cervix begins to dilate is the:

The autosomes a person has are:

In the placenta:

In the embryo,the epidermis and nervous system are derived from the ____________________.

In order for a recessive trait to appear in the phenotype:

During labor,the hormone that causes strong contractions of the uterus is ____________________.

The chorion is the embryonic membrane that contributes to the formation of the ____________________.

Fertilization of an ovum usually takes place in the ____________________.

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

After birth,the infant's ductus venosus constricts because:

For people,curly hair is dominant and straight hair is recessive.Mom and Dad both have curly hair,and their first child has straight hair.What does this tell us about Mom and Dad?

Blood is carried from the fetus to the placenta by the ____________________,and this blood has high levels of the gas ____________________.

During pregnancy,the placental hormone that inhibits contractions of the myometrium is ____________________.

The umbilical vein contains blood that has a high level of: