Question 1

Phenotype means:

Accepted Answer

A) The number of gametes in an individual 
B) The number of chromosomes in an individual 
C) The combination of alleles in an individual 
D) The genes an individual has 
E) The observable expression of the genes in an individual

Question 2

The movement of DNA from one chromosome to a nonhomologous chromosome that will be passed onto future generations:

Accepted Answer

A) Is nondisjunction during meiosis 
B) Is translocation during meiosis 
C) Is translocation during mitosis 
D) Is nondisjunction during mitosis

Question 3

Autosomes:

Accepted Answer

A) Are chromosomes that are the same for both sexes 
B) Include the Y chromosome in humans 
C) Include the X chromosome in humans 
D) Are the sex chromosomes 
E) All are correct

Question 4

If a pea plant is heterozygous for yellow seeds (Yy),which gametes could it produce?

Accepted Answer

A) Y 
B) Y or y 
C) y 
D) Yy 
E) YYyy

Question 5

If you cross two pea plants,one with green peas and the other with yellow peas.All of the offspring have yellow peas.The yellow and green parental plants:

Accepted Answer

A) Both have the same alleles for pea color 
B) Both have the same gene for pea color 
C) Have different genes for pea color 
D) Have different loci for pea color 
E) Have different numbers of chromosomes

Question 6

Organisms other than humans have mechanisms other than the X and Y chromosomes for determining sex of an individual.

Accepted Answer

A) True 
 B)False

Question 7

In humans,alleles are inherited from:

Accepted Answer

A) Females only (moms) 
B) Males only (dads) 
C) Males and females (one allele from each parent) 
D) Males and females (two alleles from each parent) 
E) None are correct

Question 8

X-linked recessive disorders affect more females than males.

Accepted Answer

A) True 
 B)False

Question 9

In a karyotype,the major characteristics that uniquely identify each chromosome are:

Accepted Answer

A) Sequence of nitrogen bases, types of proteins, and banding pattern 
B) Types of proteins, number of telomeres, and size 
C) Size, number of telomeres, and banding pattern 
D) Centromere position, banding pattern, and size 
E) Position in the nucleus, types of proteins, and size

Question 10

What did the researchers conclude from figure 10.28?

Accepted Answer

A) That resistance to Bt toxin is dominant 
B) That the number of larvae is dependent on treatment with Bt toxin 
C) That resistance to Bt toxin is recessive 
D) That the size of larvae is dependent on treatment with Bt toxin 
E) That resistance to Bt toxin is not genetic

Question 11

If a person has a recessive allele for a disease and that allele is masked by a normal dominant allele,this person:

Accepted Answer

A) Homozygous for the disease 
B) Cannot produce gametes 
C) Is termed a "carrier" 
D) Is termed a linkage group 
E) Has the disease but cannot pass this disease to their offspring

Question 12

Genotypes are the outward expression of an allele combination.

Accepted Answer

A) True 
 B)False

Question 13

If while examining a human karyotype,it is observed that there are 22 paired chromosomes and two chromosomes that are not the same size,this would most likely be due to:

Accepted Answer

A) The karyotype belonging to a female 
B) Nondisjunction 
C) The karyotype belonging to a male or nondisjunction 
D) The karyotype belonging to a male 
E) The karyotype belonging to a female or nondisjunction

Question 14

Having the alleles Tt is:

Accepted Answer

A) A phenotype 
B) Linkage 
C) A genotype 
D) A gene 
E) A loci

Question 15

When scientists inserted the Bt toxin gene into plant cells they created a _____.

Accepted Answer

A) New species 
B) Clone 
C) Stem cell 
D) Transgenic plant 
E) Monohybrid

Question 16

In an inherited form of high cholesterol,rr individuals have a blood cholesterol level greater than 500mg/dL,Rr individuals are near 300mg/dL,while normal (RR)cholesterol levels should be less than 200mg/dL.The R allele is ___ to the r allele.

Accepted Answer

A) Codominant 
B) Dominant 
C) Recessive 
D) Homozygous 
E) Incompletely dominant

Question 17

A male expresses an X-linked recessive disorder only if he inherits these alleles from both parents.

Accepted Answer

A) True 
 B)False

Question 18

If the two alleles for a particular gene are identical the gene pair is:

Accepted Answer

A) Homozygous 
B) Homologous 
C) Heterozygous 
D) Dominant 
E) Recessive

Question 19

A dihybrid cross of linked genes theoretically gives a phenotypic ratio of:

Accepted Answer

A) 9:3:3:1 
B) 2:1 
C) 3:1 
D) 1:1 
E) 1:1:1:1

Question 20

A gene that produces a protein that is important in more than one biochemical pathway is a ___ gene.

Accepted Answer

A) Dominant 
B) Recessive 
C) Pleiotropic 
D) Codominant 
E) Incomplete dominant

Exam 10: Patterns of Inheritance

Phenotype means:

The movement of DNA from one chromosome to a nonhomologous chromosome that will be passed onto future generations:

Autosomes:

If a pea plant is heterozygous for yellow seeds (Yy) ,which gametes could it produce?

If you cross two pea plants,one with green peas and the other with yellow peas.All of the offspring have yellow peas.The yellow and green parental plants:

Organisms other than humans have mechanisms other than the X and Y chromosomes for determining sex of an individual.

In humans,alleles are inherited from:

X-linked recessive disorders affect more females than males.

In a karyotype,the major characteristics that uniquely identify each chromosome are:

What did the researchers conclude from figure 10.28?

If a person has a recessive allele for a disease and that allele is masked by a normal dominant allele,this person:

Genotypes are the outward expression of an allele combination.

If while examining a human karyotype,it is observed that there are 22 paired chromosomes and two chromosomes that are not the same size,this would most likely be due to:

Having the alleles Tt is:

When scientists inserted the Bt toxin gene into plant cells they created a _____.

In an inherited form of high cholesterol,rr individuals have a blood cholesterol level greater than 500mg/dL,Rr individuals are near 300mg/dL,while normal (RR) cholesterol levels should be less than 200mg/dL.The R allele is ___ to the r allele.

A male expresses an X-linked recessive disorder only if he inherits these alleles from both parents.

If the two alleles for a particular gene are identical the gene pair is:

A dihybrid cross of linked genes theoretically gives a phenotypic ratio of:

A gene that produces a protein that is important in more than one biochemical pathway is a ___ gene.