Exam 29: Development and Inheritance

All of the following are true of the allantois,except that

Which of these statements about the trophoblast is false?

A ________ allele is expressed only when homozygous.

The stage of labor during which the fetus emerges from the vagina is called the ________ stage.

Shortly after gastrulation,the body and organs of the embryo begin to form.This process is called

The penetration of the endometrium by the blastocyst is referred to as

Proteolytic enzymes that digest a path through the zona pellucida include

Figure 29-2 Fetus at 10 Weeks Use Figure 29-2 to answer the following question: -Identify the structure labeled "3."

The developmental period that is the period of all embryological and early fetal development is

Figure 29-1 Early Human Development Use Figure 29-1 to answer the following question: -Identify the structures labeled "4."

Contact of a sperm with the oocyte membrane causes

________ is the percentage of individuals with a particular genotype that actually show the "expected" phenotype.(Note: Be sure to capitalize the first letter of your answer).

Which of these is not one of the extraembryonic membranes?

Figure 29-2 Fetus at 10 Weeks Use Figure 29-2 to answer the following question: -Identify the structure labeled "7."

The trophoblast has many of the characteristics of ________ cells.

In simple autosomal inheritance,phenotypic characters are determined,or controlled,by

The term ________ refers to the time spent in prenatal development.

If both parents are heterozygous dominant for a trait,what is the probability of an offspring inheriting the recessive trait?

The cell that results from the fusion of a secondary oocyte and a spermatozoon is called a ________.

The outer layer of the blastocyst that can penetrate the endometrium is the ________.