Question 1

During the embryonic period,the endoderm is formed,which will become the ____.

Accepted Answer

A) skin,hair,nails,sensory organs and nervous system 
B) muscles,bones,reproductive system and circulatory system 
C) digestive and respiratory systems 
D) hormonal and endocrine systems

Question 2

Which prenatal period is considered a critical period when teratogens are most likely to have severe and enduring effects? Why?

Accepted Answer

The answer of Which prenatal period is considered a critical...

Question 3

According to the text,which of the following is a safe amount of alcohol an individual can consume during pregnancy?

Accepted Answer

A) 1 glass of wine per week 
B) 1 glass of wine per week only after the second trimester 
C) 1 glass of wine per week only after the third trimester 
D) none at all

Question 4

How many pairs of chromosomes do humans have?

Accepted Answer

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

Question 5

Which of the following are examples of teratogens?

Accepted Answer

A) calcium,iron,and iodine 
B) prenatal vitamins and micronutrients 
C) meats,grains,and legumes 
D) alcohol,tobacco,and other drugs

Question 6

What is occurring when the phenotype is influenced primarily but not exclusively by the dominant gene?

Accepted Answer

A) expression of the dominant gene 
B) expression of the recessive gene 
C) incomplete dominance 
D) failure of expression

Question 7

What is the condition in which the neonate is born with an extreme distortion in the shape of the spinal column?

Accepted Answer

A) spina bifida 
B) anencephaly 
C) microencephaly 
D) exoancephaly

Question 8

What is the name of the white slimy substance that covers the fetus's skin?

Accepted Answer

A) lanugo 
B) vernix 
C) keratin 
D) ossicles

Question 9

What is another name for trisomy-21?

Accepted Answer

A) Non Sex-linked-21 
B) intellectual disability 
C) Edward's syndrome 
D) Down syndrome

Question 10

Based upon the accumulated scientific knowledge on prenatal care,which of the following is the greatest thing a woman who is pregnant can do?

Accepted Answer

A) avoid drinking of any alcohol 
B) minimize as much stress as possible 
C) receive regular evaluations from a health care professional 
D) cut all caffeine from her diet

Question 11

What determines the sex of the offspring?

Accepted Answer

A) the ovum 
B) the first sperm cell to arrive at the ovum 
C) egg re-arrangement at fertilization 
D) time of the monthly cycle when fertilization occurs

Question 12

What prenatal technique uses high-frequency waves to examine the characteristics of the fetus in-utero?

Accepted Answer

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

Question 13

What measure allows researchers to estimate not just genetic influence,but of how much the environment allows the genes to be expressed?

Accepted Answer

A) genetic correlation 
B) heritability estimate 
C) concordance rate 
D) chromosomal

Question 14

At the end of the eighth week the embryo is only one inch long and weighs just one gram.According to the text,what can the embryo now do?

Accepted Answer

A) Step in place 
B) Suck its thumb 
C) Vocalize 
D) Respond to touch

Question 15

During the embryonic period

Accepted Answer

A) the blastocyst forms. 
B) the zygote is created. 
C) the zygote attaches to the uterine wall. 
D) the nervous system develops.

Question 16

If temperament were genetically based,which of the following would have the greatest degree of similarity?

Accepted Answer

A) monozygotic twins 
B) dizygotic twins 
C) parents and children 
D) cousins

Question 17

What are the first 2 weeks after fertilization referred to as?

Accepted Answer

A) the germinal period 
B) the embryonic period 
C) the fetal period 
D) the fertilization period

Question 18

Which measure allows behavior geneticists to determine the percentage of similarity in phenotype among pairs of family members and is used mostly to examine mental disorders?

Accepted Answer