Question 1

At the end of the first division of meiosis,each second generation cell contains:

Accepted Answer

A) 46 double stranded chromosomes 
B) 46 single stranded chromosomes 
C) 23 double stranded chromosomes 
D) 23 single stranded chromosomes

Question 2

A trait which is inherited as a dominant is expressed in the:

Accepted Answer

A) homozygous recessive individual 
B) homozygous dominant individual 
C) heterozygous individual 
D) b and c

Question 3

What has the study of cytogenetics added to our understanding of Mendelian genetics?

Accepted Answer

The answer of What has the study of cytogenetics added...

Question 4

Mitochondrial DNA is inherited from:

Accepted Answer

A) the father only 
B) the mother only 
C) both the mother and the father 
D) neither the mother nor the father;it develops after conception

Question 5

If a specific trait that is found in one member of a set of identical twins is found in the other 90 percent of the time,yet is found less than 25 percent of the time in both members of sets of nonidentical twins,we would conclude that the environment:

Accepted Answer

A) was the major cause of the trait 
B) played a relatively great role in determining the trait 
C) was as important as the genotype in determining the trait 
D) played a relatively minor role in determining the trait

Question 6

Early studies of heredity centered on human characteristics.What are some of the explanations that explain why the discovery of the principles of heredity was first made on the basis of plant reproduction as opposed to human reproduction?

Accepted Answer

The answer of Early studies of heredity centered on human...

Question 7

Gregor Mendel's work,published in 1866,was:

Accepted Answer

A) not generally known until 1900 
B) immediately accepted by Mendel's contemporaries 
C) footnoted extensively by Charles Darwin in The Origin of Species 
D) used by Francis Galton in his studies of human heredity

Question 8

Meiosis differs from mitosis in that in meiosis:

Accepted Answer

A) there are two cycles of division 
B) the chromosome number is cut in half 
C) crossing-over can occur 
D) all of the above

Question 9

Matching Questions
match each genotype with its symbols:
-A heterozygous

Accepted Answer

A) AA 
B) Aa 
C) aa

Question 10

What is the essential difference between a male and a female in cellular terms?

Accepted Answer

The answer of What is the essential difference between a...

Question 11

Some biologists feel that the phenotypic ratios obtained by Gregor Mendel in his experiments with pea plants were too good to be true.Did Mendel fake his data?

Accepted Answer

The answer of Some biologists feel that the phenotypic ratios...

Question 12

Matching Questions
 match the concept to its definition:
-homozygous

Accepted Answer

A) having the same alleles of the same gene 
B) the inheritance patterns of differing traits are independent of one another 
C) in the production of sex cells,the paired hereditary units separate into different sex cells 
D) bred only with the same kind and shows the same trait over many generations

Question 13

The chromosomes that make us a pair are called:

Accepted Answer

A) homologous 
B) linked 
C) associated 
D) homozygous

Question 14

New combinations of alleles on the same chromosomes as a result of crossing-over is referred to as:

Accepted Answer

A) recombination 
B) linkage 
C) mitosis 
D) homology

Question 15

Which of the following characteristics is least influenced by the environment?

Accepted Answer

A) skin color 
B) stature 
C) PTC tasting 
D) intelligence

Question 16

Huntington's chorea is inherited as a dominant trait.A person who does not suffer from this abnormality would have a genotype:

Accepted Answer

A) HH 
B) Hh 
C) hh 
D) HH or Hh

Question 17

Gregor Mendel demonstrated that the hereditary units:

Accepted Answer

A) are discrete 
B) blend with one another 
C) are composed of DNA 
D) all of the above

Question 18

Matching Questions
 match the concept to its definition:
-independent assortment

Accepted Answer

A) having the same alleles of the same gene 
B) the inheritance patterns of differing traits are independent of one another 
C) in the production of sex cells,the paired hereditary units separate into different sex cells 
D) bred only with the same kind and shows the same trait over many generations

Question 19

The two resulting cells formed by mitosis have:

Accepted Answer

A) the same number of chromosomes as the parent cell 
B) one-half the number of chromosomes of the parent cell 
C) twice the number of chromosomes of the parent cell 
D) none of the above

Question 20

The phenotype is the result of:

Accepted Answer

A) the genotype 
B) the environment 
C) traits 
D) a and b

Exam 2: The Study of Heredity