Exam 21: Human Development and Genetics

Which statement is NOT true of genes?

The genetic code in the nucleus of a cell is contained in the ____________________ of the ____________________.

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

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

For people, having dimples is dominant and having no dimples is recessivE.Genetics problem: Dad has no dimples and Mom is homozygous for dimples. The percent chance that a child of theirs will NOT have dimples is ____________________.

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

In later pregnancy, the placenta secretes the hormones ____________________ and ____________________.

A human cell contains ____________________ pair(s) of autosomes and ____________________ pair(s) of sex chromosomes.

A human zygote contains how many chromosomes?

During the ____________________ stage of labor, the cervix dilates.

The human ____________________ has ____________________ chromosomes and is formed by the union of egg and sperm.

The possibilities for the expression of a gene are called ____________________.

During the ____________________ stage of labor, the baby is delivered.

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

The early embryonic stage that is a solid sphere of cells is the:

For people, a widow's peak is dominant and a straight hairline is recessivE.Genetics problem: Both Mom and Dad are heterozygous for a widow's peak. The percent chance that a child of theirs will have a straight hairline is ____________________.

When the gene for a trait is found only on the X chromosome, the trait is said to be ____________________.

Which of these embryonic structures is NOT paired with the correct primary germ layer from which it develops?

If a trait may appear in the phenotype only when two genes for it are present, that trait is called:

The placenta is formed by: