Exam 29: Development and Inheritance

________ are nearly identical cells that are produced by early cleavages.

The mesoderm forms

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

By the end of gestation,maternal blood volume normally increases by almost ________ percent.

The mesoderm and the trophoblast combine to form the

The almost identical cells produced by cleavage divisions are called ________.

If a sperm carrying the "Y" chromosome fertilizes the ovum the resulting offspring will be:

The endoderm forms

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

Events in the first 12 weeks of gestation establish the basis for ________,the process of organ formation.

In polygenic inheritance,phenotypic characters are

A zygote whose genotype is XY will develop as a ________.

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

A woman who is heterozygous for blood type A mates with a man who is homozygous for blood type O. What blood type(s)would their children have?

The clear liquid secreted by the mammary glands before milk production begins is called ________.

Where in the embryo does mesoderm first appear?

In ________,implantation occurs somewhere other than in the uterus.

Sperm cannot fertilize an oocyte until they

The original 46 chromosomes and their component genes constitute an individual's ________.

Figure 29-2 Fetus at 10 Weeks Use Figure 29-2 to answer the following question: -Identify the structure labeled "5."