Exam 20: Development

What is the term for the region of the blastocyst that develops into the embryo?

All of the following occur during the embryonic period EXCEPT formation of

The period of development before birth is called _____ development.

What is the term for the vessels that carry fetal blood to the placenta for gaseous exchange?

What is the term for the cells that enclose a blastocele?

The postnatal development period during which an individual learns to sit,walk,smile,and laugh is the _____ period.

What is the term for the series of mitotic cell divisions that begin shortly after fertilization?

The cells around the periphery of a blastocyst form the

Morphogenesis refers to the

All of the following are characteristic of colostrum EXCEPT

Recessive genes express themselves even when they are heterozygous.

The outermost extraembryonic membrane that contributes to the formation of the placenta is the

The extraembryonic membrane that contributes to the formation of umbilical blood vessels is the

For fertilization to occur,many sperm are needed to

The primary germ layers that develop during the pre-embryonic period include all of the following EXCEPT

The vessel that carries oxygenated blood from the placenta to the fetus is the

The expression of genes is called

The expulsion stage of labor generally lasts for 3-4 hours.

Assume that eye color is an autosomal trait and that brown eye color is dominant over blue eye color.If one parent is homozygous for brown eyes and the other parent is homozygous for blue eyes,then

The blood vessel that bypasses the lungs in fetal circulation is the