Exam 50: Animal Development

Arrange the developmental stages in the proper order.

Unequal distribution of yolk and other components in a mature egg is termed ____.

During differentiation, organs develop with different numbers of cells due to ____.

When the SRY gene of the Y chromosome becomes active (around seven weeks), the ____.

Eggs from which organism contain the lowest percentage of yolk?

Normally, human fertilization occurs in the ____.

During early embryonic development, implantation into the uterine lining occurs at the ____ stage.

During mitotic cleavage. ____.

During ____, the three germ layers rearrange to produce tissues and organs.

In ____, one group of cells causes or influences another nearby group of cells to follow a particular developmental pathway.

Tissues present during organ development that are not found in the fully formed organ are removed by ____.

In vertebrates, organogenesis begins with ____.

The hormone progesterone triggers the smooth muscles of the uterine wall to begin the contractions of labor.

What is the immune function of the placenta in human embryonic development?

What is the evidence that differentiation produces specialized cells without the loss of genes?

List and briefly describe the four stages of whole-cell migration.

During gastrulation in frog embryos, cells migrate into the blastopore by a process called ____.

Evidence that all differentiated cells contain the organism's complete genome is provided by ____.

Place the three primary cell layers of an embryo in order from superficial to deep.

When a dorsal lip from a newt is attached to the ventral side of another embryo, it results in ____.