Exam 26: Development and Inheritance

A(n) ________ allele will always be expressed regardless of what the other allele happens to be.

The ________ chromosomes determine gender.

The period of gestation when the rudiments of all major organ systems are established is the ________ trimester.

Figure 26-1 Early Human Development Use Figure 26-1 to answer the following questions: -Identify the stage labeled "8."

The blood vessels that carry deoxygenated blood to the placenta are the ________.

The neonatal period extends

Figure 26-2 Fetus at 10 Weeks Use Figure 26-2 to answer the following questions: -Identify the structure labeled "3."

The developmental period heralded by the onset of puberty is known as ________.

What is the developmental fate of "9? "

The mesoderm forms

The period of gestation when organs and organ systems complete most of their development and the fetus looks distinctly human is the ________ trimester.