Question 1

A ________ allele is expressed only when homozygous.

Accepted Answer

recessive

Question 2

Which of these is not one of the extraembryonic membranes?

Accepted Answer

A)  yolk sac
B)  amnion
C)  allantois
D)  chorion
E)  umbilical cordF) B) and D)
G) D) and E)

Question 3

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

Accepted Answer

A)  first trimester.
B)  second trimester.
C)  third trimester.
D)  infancy.
E)  adolescence.F) None of the above
G) C) and D)

Question 4

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

Accepted Answer

A)  10%
B)  25%
C)  50%
D)  75%
E)  100%F) B) and C)
G) A) and E)

Question 5

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

Accepted Answer

The answer of The term ________ refers to the time...

Question 6

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

Accepted Answer

A)  a single pair of alleles.
B)  multiple alleles.
C)  the action of a single gene.
D)  regulator genes on a different chromosome.
E)  the genes on the Y chromosome.F) A) and D)
G) C) and D)

Question 7

Which of these statements about the trophoblast is false?

Accepted Answer

A)  secretes hyalouronidase to erode endometrial cell adhesion
B)  absorbs nutrients released by degenerating endometrial glands
C)  has both an acellular and cellular component
D)  is derived from the inner cell mass
E)  causes maternal blood vessels to break downF) C) and D)
G) A) and D) D

Question 8

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

Accepted Answer

The answer of The cell that results from the fusion...

Question 9

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

Accepted Answer

A)  cleavage.
B)  implantation.
C)  placentation.
D)  embryogenesis.
E)  fertilization.F) C) and E)
G) A) and B)

Question 10

Contact of a sperm with the oocyte membrane causes

Accepted Answer

A)  oocyte activation.
B)  completion of the second meiosis.
C)  extrusion of the second polar body.
D)  membrane fusion.
E)  All of the answers are correct.F) D) and E)
G) C) and E)

Question 11

The trophoblast has many of the characteristics of ________ cells.

Accepted Answer

A)  cardiac
B)  cancer
C)  infectious
D)  rejuvenating
E)  epithelialF) A) and E)
G) A) and B)

Question 12

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

Accepted Answer

A)  zygotic twins
B)  morula
C)  blastomere
D)  trophoblast
E)  polar bodiesF) None of the above
G) B) and E)

Question 13

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

Accepted Answer

The answer of The outer layer of the blastocyst that...

Question 14

________ 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).

Accepted Answer

The answer of ________ is the percentage of individuals with...

Question 15

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

Accepted Answer

A)  emergence
B)  dilation
C)  placental
D)  expulsion
E)  fetalF) A) and B)
G) D) and E)

Question 16

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

Accepted Answer

A)  cleavage.
B)  implantation.
C)  placentation.
D)  embryogenesis.
E)  germination.F) B) and E)
G) D) and E)

Question 17

Proteolytic enzymes that digest a path through the zona pellucida include

Accepted Answer

A)  hyaluronidase and hCG.
B)  hyaluronidase and acrosin.
C)  acrosin and collagenase.
D)  relaxin and hyalouronidase.
E)  acetic acid and hydrochloric acid.F) B) and E)
G) D) and E)

Question 18

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

Accepted Answer

A)  it derives partly from endoderm.
B)  it projects into the umbilical cord.
C)  it stores nitrogenous wastes.
D)  part will develop as the urinary bladder.
E)  it acts as the fetal bone marrow.F) A) and B)
G) All of the above E

Question 19

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

Accepted Answer

A)  amnion
B)  chorion
C)  decidua basalis
D)  placenta
E)  endometriumF) All of the above
G) D) and E)

Question 20

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

Accepted Answer

A)  umbilical cord
B)  placenta
C)  decidua basalis
D)  decidua capsularis
E)  yolk sacF) A) and B)
G) A) and C)

Exam 29: Development and Inheritance

A ________ allele is expressed only when homozygous.

Correct Answerverifiedrecessive

Which of these is not one of the extraembryonic membranes?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of these statements about the trophoblast is false?

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Contact of a sperm with the oocyte membrane causes

Correct AnswerverifiedShow Answer

The trophoblast has many of the characteristics of ________ cells.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

________ 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).

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Proteolytic enzymes that digest a path through the zona pellucida include

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified
recessive

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified