Question 1

In the following pedigree, the indicated trait is most likely caused by which type of allele?

Accepted Answer

A) autosomal recessive 
B) autosomal dominant 
C) X-linked recessive 
D) X-linked dominant 
E) Y-linked 
A) autosomal recessive 
B) autosomal dominant 
C) X-linked recessive 
D) X-linked dominant 
E) Y-linked

Question 2

At which phase of the cell cycle are sister chromatids generated?

Accepted Answer

A) G0 
B) G1 
C) G2 
D) S 
E) M 
A) G0 
B) G1 
C) G2 
D) S 
E) M

Question 3

In the following pedigree, the indicated trait is most likely caused by which type of allele?

Accepted Answer

A) autosomal recessive 
B) autosomal dominant 
C) X-linked recessive 
D) X-linked dominant 
E) Y-linked 
A) autosomal recessive 
B) autosomal dominant 
C) X-linked recessive 
D) X-linked dominant 
E) Y-linked

Question 4

Mitosis and cytoplasmic division result in the formation of two genetically identical cells.

Accepted Answer

A) True 
 B)False

Question 5

The region where the homologous chromosomal pairs align is the metaphase plate.

Accepted Answer

A) True 
 B)False

Question 6

Crossing-over occurs during prophase I of meiosis.

Accepted Answer

A) True 
 B)False

Question 7

Germ-line cells are haploid but gametes are diploid.

Accepted Answer

A) True 
 B)False

Question 8

A diploid cell with three pairs of chromosomes has the genotype Aa Bb Cc, where each gene is on a different chromosome.If this cell were to undergo meiotic division, how many genetically different types of gametes could be produced?

Accepted Answer

A) 1 
B) 3 
C) 6 
D) 8 
E) 9 
A) 1 
B) 3 
C) 6 
D) 8 
E) 9

Question 9

Color vision depends on dominant alleles of three different genes: the R gene and the G gene, both on the X chromosome, and the B gene, which is autosomal.Recessive mutant alleles of any one of these three genes can cause color blindness in homozygotes.Suppose a color-blind man marries a color-blind woman and all their offspring have normal vision.What is the genotype of the woman?

Accepted Answer

A) RR GG bb 
B) RR gg BB 
C) rr GG bb 
D) RR gg BB or RR GG bb 
E) rr GG bb or rr gg BB 
A) RR GG bb 
B) RR gg BB 
C) rr GG bb 
D) RR gg BB or RR GG bb 
E) rr GG bb or rr gg BB

Question 10

Premeiotic germ cells that divide mitotically in females are

Accepted Answer

A) primary oocytes. 
B) secondary oocytes. 
C) ootids. 
D) oogonia. 
E) ova. 
A) primary oocytes. 
B) secondary oocytes. 
C) ootids. 
D) oogonia. 
E) ova.

Question 11

Crossing-over occurs in meiosis I and meiosis II.

Accepted Answer

A) True 
 B)False

Question 12

At which of the following stages of meiosis would homologous chromosomes be paired?

Accepted Answer

A) prophase of meiosis I 
B) both prophase of meiosis I and prophase of meiosis II 
C) metaphase of meiosis I 
D) metaphase of meiosis II 
E) both prophase of meiosis I and metaphase of meiosis I 
A) prophase of meiosis I 
B) both prophase of meiosis I and prophase of meiosis II 
C) metaphase of meiosis I 
D) metaphase of meiosis II 
E) both prophase of meiosis I and metaphase of meiosis I

Question 13

In animal cells, cell division is accomplished by the formation of a cleavage furrow.

Accepted Answer

A) True 
 B)False

Question 14

Suppose you discovered a new mutation in mice that causes a curved spine.You noticed that this mutant phenotype is present only in females.When curved-spine females are crossed with normal males, the progeny are always recovered in a 1:1:1 ratio of curved-spine females, normal females, and normal males.Explain the genetic basis for this ratio.

Accepted Answer

A) hemizygous or homozygous lethal autosomal allele 
B) hemizygous or homozygous lethal sex-linked allele 
C) recessive sex-linked allele 
D) recessive autosomal allele 
E) dominant sex-linked allele 
A) hemizygous or homozygous lethal autosomal allele 
B) hemizygous or homozygous lethal sex-linked allele 
C) recessive sex-linked allele 
D) recessive autosomal allele 
E) dominant sex-linked allele

Question 15

Normal fruit flies have red eyes.Flies with mutations that block the function of the X-linked white gene have white eyes.The wild-type allele is completely dominant to mutant alleles.A white-eyed female fruit fly is mated to a red-eyed male.One of their hundreds of female progeny is white-eyed.What is the likely karyotype of this white-eyed daughter?

Accepted Answer

A) XX 
B) XXY 
C) XO 
D) XXX 
E) XYY 
A) XX 
B) XXY 
C) XO 
D) XXX 
E) XYY

Question 16

DNA replication occurs in mitosis.

Accepted Answer

A) True 
 B)False

Question 17

In the following pedigree, the indicated trait is most likely caused by which type of allele?

Accepted Answer

A) autosomal recessive 
B) autosomal dominant 
C) X-linked recessive 
D) X-linked dominant 
E) Y-linked 
A) autosomal recessive 
B) autosomal dominant 
C) X-linked recessive 
D) X-linked dominant 
E) Y-linked

Question 18

Which of the following statements applies to homologous nonsister chromatids?

Accepted Answer

A) Their centromeres are attached during meiosis II. 
B) They are genetically identical. 
C) They segregate from each other at anaphase of mitosis. 
D) They contain the same genes in the same order but may have different alleles of some genes. 
E) More than one statement applies to homologous chromatids. 
A) Their centromeres are attached during meiosis II. 
B) They are genetically identical. 
C) They segregate from each other at anaphase of mitosis. 
D) They contain the same genes in the same order but may have different alleles of some genes. 
E) More than one statement applies to homologous chromatids.

Question 19

The domestic dog has 39 pairs of homologous chromosomes.A dog's somatic cells have ________ chromosomes and gametes have ________ chromosomes.

Accepted Answer

A) 78; 78 
B) 78; 39 
C) 39; 15 
D) 156; 78 
E) 39; 39 
A) 78; 78 
B) 78; 39 
C) 39; 15 
D) 156; 78 
E) 39; 39

Question 20

Microtubules that originate at opposite centrosomes and interdigitate near the cell's equator without attaching to chromosomes are the

Accepted Answer

A) kinetochore microtubules. 
B) polar microtubules. 
C) astral microtubules. 
D) interdigitating microtubules. 
A) kinetochore microtubules. 
B) polar microtubules. 
C) astral microtubules. 
D) interdigitating microtubules.

In the following pedigree, the indicated trait is most likely caused by which type of allele?

At which phase of the cell cycle are sister chromatids generated?

In the following pedigree, the indicated trait is most likely caused by which type of allele?

Mitosis and cytoplasmic division result in the formation of two genetically identical cells.

The region where the homologous chromosomal pairs align is the metaphase plate.

Crossing-over occurs during prophase I of meiosis.

Germ-line cells are haploid but gametes are diploid.

A diploid cell with three pairs of chromosomes has the genotype Aa Bb Cc, where each gene is on a different chromosome.If this cell were to undergo meiotic division, how many genetically different types of gametes could be produced?

Premeiotic germ cells that divide mitotically in females are

Crossing-over occurs in meiosis I and meiosis II.

At which of the following stages of meiosis would homologous chromosomes be paired?

In animal cells, cell division is accomplished by the formation of a cleavage furrow.

DNA replication occurs in mitosis.

In the following pedigree, the indicated trait is most likely caused by which type of allele?

Which of the following statements applies to homologous nonsister chromatids?

The domestic dog has 39 pairs of homologous chromosomes.A dog's somatic cells have chromosomes and gametes have chromosomes.

Microtubules that originate at opposite centrosomes and interdigitate near the cell's equator without attaching to chromosomes are the

Genetics: the Study of Biological Information

Mendels Principles of Heredity

Extensions to Mendels Laws

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 Dna

Genome Annotation

Analyzing Genomic Variation

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

The Genetics of Complex Traits

Filters

Exam 4: The Chromosome Theory of Inheritance

In the following pedigree, the indicated trait is most likely caused by which type of allele?

At which phase of the cell cycle are sister chromatids generated?

In the following pedigree, the indicated trait is most likely caused by which type of allele?

Mitosis and cytoplasmic division result in the formation of two genetically identical cells.

The region where the homologous chromosomal pairs align is the metaphase plate.

Crossing-over occurs during prophase I of meiosis.

Germ-line cells are haploid but gametes are diploid.

A diploid cell with three pairs of chromosomes has the genotype Aa Bb Cc, where each gene is on a different chromosome.If this cell were to undergo meiotic division, how many genetically different types of gametes could be produced?

Premeiotic germ cells that divide mitotically in females are

Crossing-over occurs in meiosis I and meiosis II.

At which of the following stages of meiosis would homologous chromosomes be paired?

In animal cells, cell division is accomplished by the formation of a cleavage furrow.

DNA replication occurs in mitosis.

In the following pedigree, the indicated trait is most likely caused by which type of allele?

Which of the following statements applies to homologous nonsister chromatids?

The domestic dog has 39 pairs of homologous chromosomes.A dog's somatic cells have ________ chromosomes and gametes have ________ chromosomes.

Microtubules that originate at opposite centrosomes and interdigitate near the cell's equator without attaching to chromosomes are the

Genetics: the Study of Biological Information

Mendels Principles of Heredity

Extensions to Mendels Laws

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 Dna

Genome Annotation

Analyzing Genomic Variation

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

The Genetics of Complex Traits

Filters

The domestic dog has 39 pairs of homologous chromosomes.A dog's somatic cells have chromosomes and gametes have chromosomes.