Exam 29: Development and Inheritance

If a color-blind (X-linked recessive trait)man marries a woman who is heterozygous for the trait,what proportion of their male offspring can be expected to be color blind?

The traits of an individual controlled by his or her genotype are his or her

The gene for normal skin pigment (A)can also code for the recessive trait of albinism (a).An albino man and a homozygous normal pigmented woman marry and have four children.What is the phenotype of the children?

Which of the following is false concerning the allantois?

A new mother tells you that when she nurses her baby,she feels as if she is having menstrual cramps.How would you explain this phenomenon?

The extraembryonic membrane that gives rise to the umbilical cord is the

Figure 29-1 Early Human Development Use Figure 29-1 to answer the following questions: -Identify the stage labeled "8."

The ________ is the portion of the endometrium not in contact with the chorion.

The solid ball of cells that has been likened to a mulberry is called a

Placental functions are concentrated in a disc-shaped area in the endometrium called the

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

Ectoderm is to ________ as mesoderm is to ________.

In a(n)________,an incision is made in the perineal musculature.

If an individual carries two different alleles for the same trait,the individual is ________ for the trait.

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

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

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

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

The region known as the primitive streak is the site of