Question 1

During fertilization,an egg and a sperm fuse to create a single cell called a _____.

Accepted Answer

A) blastocyst 
B) fetus 
C) gamete 
D) zygote

Question 2

Identify a risk related to the use of chorionic villus sampling (CVS)as a prenatal diagnostic test.

Accepted Answer

A) Limb deformity 
B) Spina bifida 
C) Down syndrome 
D) Mental retardation

Question 3

David and Kelly are seeking help for infertility.Under their physician's guidance,they decide to undergo a procedure in which Kelly's eggs are combined in a laboratory dish with her husband's sperms.What is this procedure called?

Accepted Answer

A) Gamete transfer 
B) Intracytoplasmic sperm injection 
C) Zygote intrafallopian transfer 
D) In vitro fertilization

Question 4

Which of the following statements about the activity of genes is TRUE?

Accepted Answer

A) Genes are not collaborative. 
B) A single gene codes for a single,specific protein. 
C) Genetic expression is unaffected by environmental factors. 
D) Events that occur inside of the cell can excite or inhibit genetic expression.

Question 5

Melody and Harmony are identical twins.This means that they developed from:

Accepted Answer

A) a single egg that was fertilized by a single sperm. 
B) a single egg that was fertilized by two different sperms. 
C) two eggs that were fertilized by a single sperm. 
D) two eggs that were fertilized by two different sperms.

Question 6

Gwendolyn is having a prenatal test where her doctor uses high-frequency sound waves directed into her abdomen to check her fetus.She is most likely having a(n):

Accepted Answer

A) chorionic villus sampling. 
B) triple screen. 
C) amniocentesis. 
D) ultrasound sonography.

Question 7

Xiomarra is tall with dark curly hair and brown eyes.She is outgoing and friendly.Name these observable characteristics of her genetic makeup.

Accepted Answer

The answer of Xiomarra is tall with dark curly hair...

Question 8

_____ develop from a single zygote that splits into two genetically matching replicas,each of which becomes a person.

Accepted Answer

A) Triplets 
B) Identical twins 
C) Fraternal twins 
D) Quadruplets

Question 9

_____ is the interaction of a specific measured variation in the DNA and a specific measured aspect of the environment.

Accepted Answer

A) Heredity-environment correlation 
B) Evocative genotype-environment correlation 
C) Gene × environment (G × 
E) interaction 
D) Passive genotype-environment interaction

Question 10

List three possible causes of infertility in women and in men.What are the two strategies that can be used to overcome infertility?

Accepted Answer

The answer of List three possible causes of infertility in...

Question 11

What are some problems adopted children face at different points of development (infancy,early childhood,middle and late childhood,and adolescence)?

Accepted Answer

The answer of What are some problems adopted children face...

Question 12

List four sex-linked chromosomal abnormalities.

Accepted Answer

The answer of List four sex-linked chromosomal abnormalities....

Question 13

During the process of _____,the cell's nucleus-including the chromosomes-duplicates itself and the cell divides resulting in the formation of two cells.

Accepted Answer

A) meiosis 
B) osmosis 
C) fertilization 
D) mitosis

Question 14

_____ genes are those that make the individual more vulnerable to specific diseases or acceleration of aging.

Accepted Answer

A) Susceptibility 
B) Longevity 
C) Vulnerability 
D) Mutated

Question 15

Which of the following statements regarding chorionic villus sampling (CVS)and amniocentesis is true?

Accepted Answer

A) Both CVS and amniocentesis provide valuable information about the presence of birth defects. 
B) Both CVS and amniocentesis increase the risk of miscarriage. 
C) Both CVS and amniocentesis increase the risk of limb deformities in the fetus. 
D) Amniocentesis allows a decision on abortion to be made sooner than chorionic villus sampling.

Question 16

What are gametes?

Accepted Answer

A) Zygotes 
B) Embryos 
C) Fertilized eggs 
D) Eggs and sperm

Question 17

Sasha's 23rd chromosome pair contains two X chromosomes.This indicates that Sasha:

Accepted Answer

A) has Down syndrome. 
B) has fragile X syndrome. 
C) is a female. 
D) is a male.

Question 18

Parents often interact differently with each sibling,and siblings interact differently with parents.Even these experiences occurring within the family can be part of the _____ of siblings.

Accepted Answer

A) shared environment 
B) nonshared environment 
C) shared genes 
D) nonshared genes

Question 19

Mary and Jim are expecting a child and prenatal diagnostic procedures have confirmed that the fetus has _____,a neural tube disorder that causes brain and spine abnormalities.Their physician has explained that this gene-linked abnormality could be treated with corrective surgery at birth,orthopedic devices,and physical or medical therapy.

Accepted Answer

A) spina bifida 
B) Tay-Sachs disease 
C) phenylketonuria 
D) Huntington's disease

Question 20

What are the three ways that heredity and environment are correlated as described by behavior geneticist Sandra Scarr.

Accepted Answer

The answer of What are the three ways that heredity...

Exam 2: Biological Beginnings