Question 1

The sporophyte form of a moss is

Accepted Answer

A) haploid. 
B) diploid. 
C) tetraploid. 
D) aneuploid. 
E) either haploid or diploid. 
A) haploid. 
B) diploid. 
C) tetraploid. 
D) aneuploid. 
E) either haploid or diploid. B

Question 2

The designation of YyWw for a heterozygous pea plant is the plant's ________.

Accepted Answer

genotype

Question 3

Each of the following is an activity of RAD51 or the DNA with which it interacts except

Accepted Answer

A) RAD51 appears in cells at the time of recombination. 
B) RAD51 coats single-stranded DNA. 
C) RAD51-coated DNA interacts with double-stranded DNA. 
D) RAD51-coated DNA moves along target DNA until it finds a complementary sequence. 
E) All are RAD51 or RAD51-DNA activities. 
A) RAD51 appears in cells at the time of recombination. 
B) RAD51 coats single-stranded DNA. 
C) RAD51-coated DNA interacts with double-stranded DNA. 
D) RAD51-coated DNA moves along target DNA until it finds a complementary sequence. 
E) All are RAD51 or RAD51-DNA activities. E

Question 4

Fungi produce gametes by which of the following processes?

Accepted Answer

A) binary fission 
B) mitosis 
C) meiosis 
D) gene conversion 
E) cloning 
A) binary fission 
B) mitosis 
C) meiosis 
D) gene conversion 
E) cloning

Question 5

New combinations of genetic material give rise to genetic variability in sexually reproducing organisms through

Accepted Answer

A) crossover events between nonsister homologous chromatids. 
B) crossover events between sister chromatids. 
C) egg and sperm genetic recombination from distinct individuals. 
D) egg and sperm genetic recombination from one individual in which crossing over and independent assortment of homologues has occurred. 
E) A,C,and D all contribute to genetic variability. 
A) crossover events between nonsister homologous chromatids. 
B) crossover events between sister chromatids. 
C) egg and sperm genetic recombination from distinct individuals. 
D) egg and sperm genetic recombination from one individual in which crossing over and independent assortment of homologues has occurred. 
E) A,C,and D all contribute to genetic variability.

Question 6

DNA ________ accounts for the ability of chromosomes to undergo synapsis.

Accepted Answer

The answer of DNA ________ accounts for the ability of...

Question 7

During bacterial conjugation,interrupted matings yielded the following information: leu 10 minutes,arg 8 minutes,str 15 minutes,and amp 12 minutes.Based on this information,the order of the genes,beginning at the origin,is

Accepted Answer

A) amp-arg-leu-str. 
B) str-amp-leu-arg. 
C) leu-arg-str-amp. 
D) arg-amp-leu-str. 
E) arg-leu-amp-str. 
A) amp-arg-leu-str. 
B) str-amp-leu-arg. 
C) leu-arg-str-amp. 
D) arg-amp-leu-str. 
E) arg-leu-amp-str.

Question 8

The condition of a zygote with three copies of a chromosome is known as ________.

Accepted Answer

The answer of The condition of a zygote with three...

Question 9

How many chromatids are present in prophase I in a diploid cell in which 2n = 12?

Accepted Answer

A) 6 
B) 12 
C) 24 
D) 48 
E) Can't tell-more information is required. 
A) 6 
B) 12 
C) 24 
D) 48 
E) Can't tell-more information is required.

Question 10

For three genes known to be on the same chromosome,you obtain the following percentages for recombination events.What is the order of genes on this chromosome? 
no observable recombination 30%
Between A and B 15%
Between B and C 35%
Between A and C 20%

Accepted Answer

A) ABC 
B) ACB 
C) BAC 
D) BCA 
E) The gene order cannot be determined from this information. 
A) ABC 
B) ACB 
C) BAC 
D) BCA 
E) The gene order cannot be determined from this information.

Question 11

The stage of prophase I in which mammalian oogenesis can arrest for years is

Accepted Answer

A) leptotene. 
B) zygotene. 
C) pachytene. 
D) diplotene. 
E) diakinesis. 
A) leptotene. 
B) zygotene. 
C) pachytene. 
D) diplotene. 
E) diakinesis.

Question 12

How many different types of gametes can be produced by an individual with genotype AaBBCcDdEe,if all five genes are on different chromosomes?

Accepted Answer

A) 4 
B) 5 
C) 10 
D) 16 
E) 25 
A) 4 
B) 5 
C) 10 
D) 16 
E) 25

Question 13

The DNA sequence of two alleles of the same gene can differ by

Accepted Answer

A) approximately 100 continuous base pairs. 
B) approximately 100 base pairs scattered throughout the gene. 
C) three base pairs (one coding triplet). 
D) one base pair. 
E) no base pairs; allele sequences can be identical. 
A) approximately 100 continuous base pairs. 
B) approximately 100 base pairs scattered throughout the gene. 
C) three base pairs (one coding triplet). 
D) one base pair. 
E) no base pairs; allele sequences can be identical.

Question 14

A black Angus bull named Charlie is heterozygous (Bb)for coat color (B = black and b = brown).Charlie's black coat color is his

Accepted Answer

A) genotype. 
B) heterozygous state. 
C) gene conversion state. 
D) phenotype. 
E) homozygous state. 
A) genotype. 
B) heterozygous state. 
C) gene conversion state. 
D) phenotype. 
E) homozygous state.

Question 15

The protein shugoshin is crucial for meiosis I,because it

Accepted Answer

A) promotes chiasmata formation. 
B) condenses chromosomes. 
C) decondenses chromosomes. 
D) protects centromere cohesins from degradation by separase. 
E) attaches microtubules to kinetochores. 
A) promotes chiasmata formation. 
B) condenses chromosomes. 
C) decondenses chromosomes. 
D) protects centromere cohesins from degradation by separase. 
E) attaches microtubules to kinetochores.

Question 16

You suspect a cell that is capable of forming gametes might be carrying a gene that makes it defective in homologous recombination.Design an experiment to assess its homologous recombination capability.

Accepted Answer

This requires being able to label an ent

Question 17

The pairing of homologous chromosomes during meiosis I is known as ________.

Accepted Answer

The answer of The pairing of homologous chromosomes during meiosis...

Question 18

In mosses and fungi,the process of meiosis produces

Accepted Answer

A) egg cells. 
B) hybrids. 
C) spores. 
D) sperm cells. 
E) oocytes. 
A) egg cells. 
B) hybrids. 
C) spores. 
D) sperm cells. 
E) oocytes.

Question 19

Each of the following transfers DNA into bacteria except

Accepted Answer

A) conjugation. 
B) infection. 
C) transduction. 
D) transformation. 
E) All transfer DNA into bacteria. 
A) conjugation. 
B) infection. 
C) transduction. 
D) transformation. 
E) All transfer DNA into bacteria.

Question 20

________ chromosomes pair during ________ of meiosis.

Accepted Answer

Homologous

Exam 25: Sexual Reproduction,meiosis,and Genetic Recombination

The sporophyte form of a moss is

The designation of YyWw for a heterozygous pea plant is the plant's ________.

Each of the following is an activity of RAD51 or the DNA with which it interacts except

Fungi produce gametes by which of the following processes?

New combinations of genetic material give rise to genetic variability in sexually reproducing organisms through

DNA ________ accounts for the ability of chromosomes to undergo synapsis.

During bacterial conjugation,interrupted matings yielded the following information: leu 10 minutes,arg 8 minutes,str 15 minutes,and amp 12 minutes.Based on this information,the order of the genes,beginning at the origin,is

The condition of a zygote with three copies of a chromosome is known as ________.

How many chromatids are present in prophase I in a diploid cell in which 2n = 12?

For three genes known to be on the same chromosome,you obtain the following percentages for recombination events.What is the order of genes on this chromosome? no observable recombination 30% Between A and B 15% Between B and C 35% Between A and C 20%

The stage of prophase I in which mammalian oogenesis can arrest for years is

How many different types of gametes can be produced by an individual with genotype AaBBCcDdEe,if all five genes are on different chromosomes?

The DNA sequence of two alleles of the same gene can differ by

A black Angus bull named Charlie is heterozygous (Bb)for coat color (B = black and b = brown).Charlie's black coat color is his

The protein shugoshin is crucial for meiosis I,because it

You suspect a cell that is capable of forming gametes might be carrying a gene that makes it defective in homologous recombination.Design an experiment to assess its homologous recombination capability.

The pairing of homologous chromosomes during meiosis I is known as ________.

In mosses and fungi,the process of meiosis produces

Each of the following transfers DNA into bacteria except

________ chromosomes pair during ________ of meiosis.

A Preview of Cell Biology

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure,function,and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: Dna, chromosomes, and the Nucleus

DNA Replication, repair, and Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Molecular Biology Techniques for Cell Biology

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

The Cell Cycle and Mitosis

Filters

chromosomes pair during of meiosis.