Question 1

By the end of the eighth week,the embryo ____.

Accepted Answer

A) is unrecognizable as human 
B) responds to touch and can move 
C) has yet to develop major organs 
D) has fully developed sex organs

Question 2

What embryonic structure will become the brain and spinal cord?

Accepted Answer

A) brain stem 
B) neuralblast 
C) neural tube 
D) cerebral cortex

Question 3

In the past few decades,the average height of adults in Western countries has not changed much.This indicates that adult height for these countries has reached the upper boundary of their ____.

Accepted Answer

A) socio-economic range 
B) health status 
C) reaction range 
D) range of genetic dominance

Question 4

What helps children with trisomy-21 develop more favorably?

Accepted Answer

A) hormone replacement therapy 
B) weekly motor treatments 
C) a heart transplant 
D) supportive and encouraging parents

Question 5

During pregnancy,deficiencies in folic acid may result in ____.

Accepted Answer

A) low birth weight and premature delivery 
B) anencephaly and spina bifida 
C) Down syndrome and Turner syndrome 
D) HIV and malaria

Question 6

The human body contains how many chromosomes?

Accepted Answer

A) 23 
B) 46 
C) 69 
D) 92

Question 7

What exercise strengthens the vaginal muscles and helps prepare the mother for the delivery of the fetus?

Accepted Answer

A) bench presses 
B) squats 
C) Kegels 
D) abdominal crunches

Question 8

The average human cell has ____ chromosomes.

Accepted Answer

A) 42 
B) 46 
C) 23 
D) 26

Question 9

Based upon the reading,a midwife might perform a(n)____ if the fetus's feet are pointed towards the vaginal opening.

Accepted Answer

A) diversion 
B) prenatal massage 
C) inversion 
D) amniocentesis

Question 10

Recall the World Health Organization's guidelines for prenatal care.Name one nutrient that is of critical importance during pregnancy,where women would get it,and what the consequences would be of not having it.

Accepted Answer

The answer of Recall the World Health Organization's guidelines for...

Question 11

Your older brother has a friend who was angry with his wife because they have two sons and he wanted to have a daughter.He thought that she was responsible for having two boys rather than a boy and a girl.What would you tell your brother?

Accepted Answer

A) His friend was correct,she was purposefully having sons instead of a daughter. 
B) It was not anyone's "fault," but the sperm determined the sex of the offspring. 
C) It was not anyone's "fault" even though her ova determined the sex of the offspring. 
D) Sex of the offspring is determined by day of the week.They both should have known what day they were trying to conceive.

Question 12

Approximately how many genes comprise the human genome?

Accepted Answer

A) 10,000 
B) 23,000 
C) 50,000 
D) 100,000

Question 13

When the blastocyst becomes firmly embedded into the lining of the uterus,what has happened?

Accepted Answer

A) implantation 
B) fertilization 
C) conception 
D) pregnancy

Question 14

____ uses high-frequency sound waves that are directed toward the uterus,and as they bounce off the fetus,they are converted by a computer to an image that can be viewed on a screen.

Accepted Answer

A) Genetic counseling 
B) Ultrasound 
C) Chorionic villus sampling 
D) Amniocentesis

Question 15

Nearly all of the major organs are formed during what period?

Accepted Answer

A) genetic 
B) zygotic 
C) fetal 
D) embryonic

Question 16

What prenatal technique uses a long,hollow needle to extract amniotic fluid to examine the fetus's genotype?

Accepted Answer

A) amniocentesis 
B) chorionic villus sampling 
C) alphafetal protein 
D) ultrasound

Question 17

Sandra Scarr and Kathleen McCartney proposed the theory of genotype F1F1F1S1 environment effects.Which subtype occurs in biological families because parents provide both genes and environment for their children?

Accepted Answer

A) passive genotype F1F1F1S1environment effects 
B) evocative genotype F1F1F1S1environment effects 
C) active genotype F1F1F1S1environment effects 
D) inactive genotype F1F1F1S1environment effects

Question 18

Which question best captures the spirit of most individuals who study human development with regard to the nurture / nature question?

Accepted Answer

A) How do genes and environmental factors interact in the development of memory processes? 
B) Which human behaviors are determined genetically,and which are determined by environmental factors? 
C) At what age do environmental factors surpass genetic factors as most important in human development? 
D) Which genes are responsible for childhood behavior,and which genes are responsible for adult behavior?

Question 19

While having a conversation with a friend who is pregnant,she says to you that because she is "carrying high" she will have a girl.Based upon the textbook,which of the following statements are you thinking?

Accepted Answer

A) There is no scientific evidence to support her belief. 
B) There are countless research studies that support her belief. 
C) Statistically speaking,she is 
D) She is wrong,a pregnant woman who is "carrying high" a more likely to be carrying a boy.

Question 20

The embryonic period is ____ weeks long.

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 10

Exam 2: Genetics and Prenatal Development