Question 1

If the parents of a family already have two boys, what is the probability that the next two offspring will be girls?

Accepted Answer

A) 1 
B) 1/2 
C) 1/3 
D) 1/4 
E) 1/8 
A) 1 
B) 1/2 
C) 1/3 
D) 1/4 
E) 1/8 D

Question 2

The diploid cell formed by the fertilization of the egg by the sperm during sexual reproduction is a

Accepted Answer

A) reciprocal. 
B) zygote. 
C) dihybrid. 
D) gamete. 
E) monohybrid. 
A) reciprocal. 
B) zygote. 
C) dihybrid. 
D) gamete. 
E) monohybrid. B

Question 3

In a monohybrid cross AA * aa, what proportion of heterozygotes is expected among the F2 offspring?

Accepted Answer

A) 1/4 
B) 1/2 
C) 3/4 
D) All are heterozygotes. 
E) None are heterozygotes. 
A) 1/4 
B) 1/2 
C) 3/4 
D) All are heterozygotes. 
E) None are heterozygotes. B

Question 4

How was the approach taken by Mendel similar to the approaches taken by modern scientific inquiry?

Accepted Answer

A) Mendel repeated his rexperiments 
B) Mendel only manipulated a single variable. 
C) Mendel used the same technical methods are are used today. 
D) Mendel's experiments challenged several hypotheses that were favored at the time. 
A) Mendel repeated his rexperiments 
B) Mendel only manipulated a single variable. 
C) Mendel used the same technical methods are are used today. 
D) Mendel's experiments challenged several hypotheses that were favored at the time.

Question 5

What is/are the possible genotype(s) of person 3?

Accepted Answer

A) AA 
B) Aa 
C) Either AA or Aa 
D) aa 
E) Cannot be determined 
A) AA 
B) Aa 
C) Either AA or Aa 
D) aa 
E) Cannot be determined

Question 6

What type of cross is performed to determine the genotype of an individual?

Accepted Answer

A) testcross 
B) dihybrid 
C) monohybrid 
D) backcross 
E) controlled 
A) testcross 
B) dihybrid 
C) monohybrid 
D) backcross 
E) controlled

Question 7

If individuals 1 and 4 have a child together, what is the probability that the child will exhibit the disease?

Accepted Answer

A) 0% 
B) 25% 
C) 50% 
D) 75% 
E) 100% 
A) 0% 
B) 25% 
C) 50% 
D) 75% 
E) 100%

Question 8

The dominant trait, Huntington disease causes severe neural/brain damage at approximately age 40.A female whose mother has Huntington disease marries a male whose parents are normal.It is not known if the female has the disease.What is the probability that their firstborn will inherit the gene that causes Huntington disease?

Accepted Answer

A) 25% 
B) 50% 
C) 75% 
D) 100% 
E) 0% 
A) 25% 
B) 50% 
C) 75% 
D) 100% 
E) 0%

Question 9

Accepted Answer

A) Unaffected male 
B) Unaffected female 
C) Mating 
D) Affected male 
E) Affected female 
A) Unaffected male 
B) Unaffected female 
C) Mating 
D) Affected male 
E) Affected female

Question 10

Suppose that in plants, smooth seeds (S) are dominant to wrinkled seeds (s) and tall plants (T) are dominant to short plants (t).A tall plant with smooth seeds was backcrossed to a parent that was short and wrinkled.What proportion of the progeny is expected to be heterozygous for tall and smooth?

Accepted Answer

A) 1/2 
B) 1/4 
C) 1/8 
D) 1/16 
E) 0 
A) 1/2 
B) 1/4 
C) 1/8 
D) 1/16 
E) 0

Question 11

What is/are the possible genotype(s) of person 2?

Accepted Answer

A) AA 
B) Aa 
C) Either AA or Aa 
D) aa 
E) Cannot be determined 
A) AA 
B) Aa 
C) Either AA or Aa 
D) aa 
E) Cannot be determined

Question 12

According to Mendel's Law of Independent Assortment

Accepted Answer

A) Genes of different chromosomes randomly assort into different gametes 
B) Alleles for one gene randomly assort into different gametes 
C) Dominant alleles for one gene must assort into the same gamete as the dominant alleles for another gene 
D) Dominant alleles for one gene must assort into the same gamete as the recessive alleles for another gene 
A) Genes of different chromosomes randomly assort into different gametes 
B) Alleles for one gene randomly assort into different gametes 
C) Dominant alleles for one gene must assort into the same gamete as the dominant alleles for another gene 
D) Dominant alleles for one gene must assort into the same gamete as the recessive alleles for another gene

Question 13

In a dihybrid cross AAbb * aaBB, what proportion of the F2 offspring is expected to be homozygotic for at least one gene?

Accepted Answer

A) 1/4 
B) 1/2 
C) 3/4 
D) All are homozygotes. 
E) None are homozygotes. 
A) 1/4 
B) 1/2 
C) 3/4 
D) All are homozygotes. 
E) None are homozygotes.

Question 14

If a testcross is performed with a plant heterozygous for ligules and green leaves, what proportion of the progeny would be green and liguleless?

Accepted Answer

A) 1/16 
B) 1/8 
C) 1/4 
D) 1/2 
E) Cannot be determined 
A) 1/16 
B) 1/8 
C) 1/4 
D) 1/2 
E) Cannot be determined

Question 15

If an individual has 10 gene pairs, how many different gametes can be formed if three of the gene pairs are homozygous and the remaining seven gene pairs are heterozygous?

Accepted Answer

A) 49 
B) 100 
C) 128 
D) 1024 
E) 131,072 
A) 49 
B) 100 
C) 128 
D) 1024 
E) 131,072

Question 16

What is/are the possible genotype(s) of person 1?

Accepted Answer

A) AA 
B) Aa 
C) Either AA or Aa 
D) aa 
E) Cannot be determined 
A) AA 
B) Aa 
C) Either AA or Aa 
D) aa 
E) Cannot be determined

Question 17

Based on this pedigree, what is the most likely mode of inheritance?

Accepted Answer

A) Dominant 
B) Recessive 
C) Either dominant or recessive 
D) Cannot be determined 
A) Dominant 
B) Recessive 
C) Either dominant or recessive 
D) Cannot be determined

Question 18

Accepted Answer

A) Unaffected male 
B) Unaffected female 
C) Mating 
D) Affected male 
E) Affected female 
A) Unaffected male 
B) Unaffected female 
C) Mating 
D) Affected male 
E) Affected female

Question 19

A rare recessive trait in a pedigree is indicated by which pattern of inheritance?

Accepted Answer

A) vertical 
B) horizontal 
C) diagonal 
D) both vertical and horizontal 
E) None of these is correct. 
A) vertical 
B) horizontal 
C) diagonal 
D) both vertical and horizontal 
E) None of these is correct.

Question 20

The reason that the HD allele acts as a dominant allele is

Accepted Answer

A) The mutant HD allele suppress protein production from the normal HD allele 
B) The HD mutation results in a protein that can damage nerve cells even in the presence of the normal protein 
C) The normal HD allele does not normally produce a protein but the mutant HD allele does 
D) The protein produced from the mutant HD allele is non-functional 
A) The mutant HD allele suppress protein production from the normal HD allele 
B) The HD mutation results in a protein that can damage nerve cells even in the presence of the normal protein 
C) The normal HD allele does not normally produce a protein but the mutant HD allele does 
D) The protein produced from the mutant HD allele is non-functional

If the parents of a family already have two boys, what is the probability that the next two offspring will be girls?

The diploid cell formed by the fertilization of the egg by the sperm during sexual reproduction is a

In a monohybrid cross AA * aa, what proportion of heterozygotes is expected among the F₂ offspring?

How was the approach taken by Mendel similar to the approaches taken by modern scientific inquiry?

What is/are the possible genotype(s) of person 3?

What type of cross is performed to determine the genotype of an individual?

If individuals 1 and 4 have a child together, what is the probability that the child will exhibit the disease?

Suppose that in plants, smooth seeds (S) are dominant to wrinkled seeds (s) and tall plants (T) are dominant to short plants (t).A tall plant with smooth seeds was backcrossed to a parent that was short and wrinkled.What proportion of the progeny is expected to be heterozygous for tall and smooth?

What is/are the possible genotype(s) of person 2?

According to Mendel's Law of Independent Assortment

In a dihybrid cross AAbb * aaBB, what proportion of the F₂ offspring is expected to be homozygotic for at least one gene?

If a testcross is performed with a plant heterozygous for ligules and green leaves, what proportion of the progeny would be green and liguleless?

If an individual has 10 gene pairs, how many different gametes can be formed if three of the gene pairs are homozygous and the remaining seven gene pairs are heterozygous?

What is/are the possible genotype(s) of person 1?

Based on this pedigree, what is the most likely mode of inheritance?

A rare recessive trait in a pedigree is indicated by which pattern of inheritance?

The reason that the HD allele acts as a dominant allele is

Genetics: The Study of Biological Information

Extensions to Mendels Laws

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

DNA Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: The Flow of Information From DNA to RNA to Protein

Digital Analysis of Genomes

Analyzing Genomic Information

The Eukaryotic Chromosome

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Variation and Selection in Populations

Genetics of Complex Traits

Filters

Exam 2: Mendels Principles of Heredity

If the parents of a family already have two boys, what is the probability that the next two offspring will be girls?

The diploid cell formed by the fertilization of the egg by the sperm during sexual reproduction is a

In a monohybrid cross AA * aa, what proportion of heterozygotes is expected among the F2 offspring?

How was the approach taken by Mendel similar to the approaches taken by modern scientific inquiry?

What is/are the possible genotype(s) of person 3?

What type of cross is performed to determine the genotype of an individual?

If individuals 1 and 4 have a child together, what is the probability that the child will exhibit the disease?

Suppose that in plants, smooth seeds (S) are dominant to wrinkled seeds (s) and tall plants (T) are dominant to short plants (t).A tall plant with smooth seeds was backcrossed to a parent that was short and wrinkled.What proportion of the progeny is expected to be heterozygous for tall and smooth?

What is/are the possible genotype(s) of person 2?

According to Mendel's Law of Independent Assortment

In a dihybrid cross AAbb * aaBB, what proportion of the F2 offspring is expected to be homozygotic for at least one gene?

If a testcross is performed with a plant heterozygous for ligules and green leaves, what proportion of the progeny would be green and liguleless?

If an individual has 10 gene pairs, how many different gametes can be formed if three of the gene pairs are homozygous and the remaining seven gene pairs are heterozygous?

What is/are the possible genotype(s) of person 1?

Based on this pedigree, what is the most likely mode of inheritance?

A rare recessive trait in a pedigree is indicated by which pattern of inheritance?

The reason that the HD allele acts as a dominant allele is

Genetics: The Study of Biological Information

Extensions to Mendels Laws

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

DNA Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: The Flow of Information From DNA to RNA to Protein

Digital Analysis of Genomes

Analyzing Genomic Information

The Eukaryotic Chromosome

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Variation and Selection in Populations

Genetics of Complex Traits

Filters

In a monohybrid cross AA * aa, what proportion of heterozygotes is expected among the F₂ offspring?

In a dihybrid cross AAbb * aaBB, what proportion of the F₂ offspring is expected to be homozygotic for at least one gene?