Question 1

Sexual reproduction and meiosis generate genetic variety by

Accepted Answer

A) random fertilization. 
B) All answers are correct. 
C) independent assortment. 
D) crossing over. 
A) random fertilization. 
B) All answers are correct. 
C) independent assortment. 
D) crossing over. B

Question 2

A diploid cell with 4 chromosomes would produce which of the following after meiosis?

Accepted Answer

A) Two genetically-distinct types of haploid gametes 
B) Two genetically-distinct types of diploid gametes 
C) Four genetically-distinct types of haploid gametes 
D) Four genetically-distinct types of diploid gametes 
E) Four genetically-identical diploid gametes 
A) Two genetically-distinct types of haploid gametes 
B) Two genetically-distinct types of diploid gametes 
C) Four genetically-distinct types of haploid gametes 
D) Four genetically-distinct types of diploid gametes 
E) Four genetically-identical diploid gametes C

Question 3

Why does sexual reproduction produce more genetic variability in a population?

Accepted Answer

A) Offspring are genetically identical to one parent. 
B) During sex,adults can exchange genetic material thus increasing their variability. 
C) Organisms arising from sexual reproduction can change their genetic material in response to environmental changes. 
D) Sexually-reproducing organisms mutate more rapidly than asexually reproducing organisms. 
E) Offspring are a genetic mix of both parents. 
A) Offspring are genetically identical to one parent. 
B) During sex,adults can exchange genetic material thus increasing their variability. 
C) Organisms arising from sexual reproduction can change their genetic material in response to environmental changes. 
D) Sexually-reproducing organisms mutate more rapidly than asexually reproducing organisms. 
E) Offspring are a genetic mix of both parents. E

Question 4

In meiosis,DNA replicates during

Accepted Answer

A) prophase I. 
B) prophase II. 
C) interphase prior to meiosis II. 
D) interphase prior to meiosis I. 
E) both prophase I and prophase II. 
A) prophase I. 
B) prophase II. 
C) interphase prior to meiosis II. 
D) interphase prior to meiosis I. 
E) both prophase I and prophase II.

Question 5

Diploid means having

Accepted Answer

A) one complete set of chromosomes. 
B) three complete sets of chromosomes. 
C) two complete sets of chromosomes. 
D) two chromosomes in each somatic cell. 
E) two chromosomes in each gametE. 
A) one complete set of chromosomes. 
B) three complete sets of chromosomes. 
C) two complete sets of chromosomes. 
D) two chromosomes in each somatic cell. 
E) two chromosomes in each gametE.

Question 6

If a human zygote has either 45 or 47 chromosomes it was caused by random fertilization.

Accepted Answer

A) True 
 B)False

Question 7

A diploid germ cell will produce cells that have reduced the chromosome number by half,generating four haploid nuclei in

Accepted Answer

A) fertilization. 
B) mitosis. 
C) meiosis. 
D) replication. 
E) mutation. 
A) fertilization. 
B) mitosis. 
C) meiosis. 
D) replication. 
E) mutation.

Question 8

Homologous chromosomes contain the same ____ but may contain different ____.

Accepted Answer

A) alleles,genes 
B) sister chromatids,genes 
C) alleles,sister chromatids 
D) genes,sister chromatids 
E) genes,alleles 
A) alleles,genes 
B) sister chromatids,genes 
C) alleles,sister chromatids 
D) genes,sister chromatids 
E) genes,alleles

Question 9

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",Tragopogon mirus is a hybrid of T.dubius and T porrifolius.Based on the figure,T.mirus has

Accepted Answer

A) 12 chromosomes from T.dubius and 12 chromosomes from T.porrifolius. 
B) 6 chromosomes from T.dubius and 6 chromosomes from T.porrifolius. 
C) 24 chromosomes from T.dubius and 24 chromosomes from T.porrifolius. 
D) 24 chromosomes from T.dubius. 
E) 24 chromosomes from T.porrifolius. 
A) 12 chromosomes from T.dubius and 12 chromosomes from T.porrifolius. 
B) 6 chromosomes from T.dubius and 6 chromosomes from T.porrifolius. 
C) 24 chromosomes from T.dubius and 24 chromosomes from T.porrifolius. 
D) 24 chromosomes from T.dubius. 
E) 24 chromosomes from T.porrifolius.

Question 10

Mitotic cell division creates identical copies by replicating a cell's DNA __________ and then dividing ____________.

Accepted Answer

A) once,twice 
B) twice,once 
C) twice,twice 
D) once,once 
E) None of the answers are correct. 
A) once,twice 
B) twice,once 
C) twice,twice 
D) once,once 
E) None of the answers are correct.

Question 11

If you mate a donkey (2n = 62)with a horse (2n = 64)you get a mule.A mule is sterile and cannot produce gametes by meiosis because

Accepted Answer

A) they contain too few chromosomes. 
B) they have an odd number of chromosomes. 
C) they have an even number of chromosomes. 
D) they contain too many chromosomes. 
E) they lack genes that are essential for lifE. 
A) they contain too few chromosomes. 
B) they have an odd number of chromosomes. 
C) they have an even number of chromosomes. 
D) they contain too many chromosomes. 
E) they lack genes that are essential for lifE.

Question 12

Why is it essential that meiosis produce haploid cells?

Accepted Answer

A) so that the number of chromosomes will double each generation 
B) to produce haploid offspring 
C) to prevent the number of chromosomes from doubling each generation 
D) to produce diploid gametes 
E) to allow asexual reproduction 
A) so that the number of chromosomes will double each generation 
B) to produce haploid offspring 
C) to prevent the number of chromosomes from doubling each generation 
D) to produce diploid gametes 
E) to allow asexual reproduction

Question 13

Meiosis is a process that produces

Accepted Answer

A) sperm cells. 
B) egg cells. 
C) gametes. 
D) haploid cells. 
E) All answers are correct. 
A) sperm cells. 
B) egg cells. 
C) gametes. 
D) haploid cells. 
E) All answers are correct.

Question 14

In humans,the sex of a child is determined by

Accepted Answer

A) the sex chromosome in the egg. 
B) the number of autosomes in the sperm. 
C) the number of autosomes in the egg. 
D) the sex chromosome in the sperm. 
E) the number of X chromosomes in the egg. 
A) the sex chromosome in the egg. 
B) the number of autosomes in the sperm. 
C) the number of autosomes in the egg. 
D) the sex chromosome in the sperm. 
E) the number of X chromosomes in the egg.

Question 15

Which of the following will occur in meiosis but not in mitosis?

Accepted Answer

A) metaphase 
B) cytokinesis 
C) crossing over 
D) DNA replication 
E) chromosome condensation 
A) metaphase 
B) cytokinesis 
C) crossing over 
D) DNA replication 
E) chromosome condensation

Question 16

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",pollen contains _____ that produce _____.

Accepted Answer

A) gametophytes,spores 
B) sporophytes,sperm 
C) sporophytes,spores 
D) sperm,spores 
E) gametophytes,sperm 
A) gametophytes,spores 
B) sporophytes,sperm 
C) sporophytes,spores 
D) sperm,spores 
E) gametophytes,sperm

Question 17

When a human egg ovulates,it arrests in metaphase II until it is fertilized by a sperm.How many chromosomes are present in the egg at metaphase II?

Accepted Answer

A) 46 
B) 2 with sister chromatids still attached 
C) 4 
D) 23 with sister chromatids still attached 
E) 1 
A) 46 
B) 2 with sister chromatids still attached 
C) 4 
D) 23 with sister chromatids still attached 
E) 1

Question 18

Chromosomes that look alike and carry the same sequence of genes for the same traits are

Accepted Answer

A) the X and Y chromosome. 
B) all the autosomes. 
C) homologous chromosomes. 
D) found in females only. 
E) found in males only. 
A) the X and Y chromosome. 
B) all the autosomes. 
C) homologous chromosomes. 
D) found in females only. 
E) found in males only.

Question 19

What two processes results in genetically-different products?

Accepted Answer

A) mitosis and meiosis 
B) mitosis and asexual reproduction 
C) meiosis and asexual reproduction 
D) meiosis and sexual reproduction 
E) mitosis and sexual reproduction 
A) mitosis and meiosis 
B) mitosis and asexual reproduction 
C) meiosis and asexual reproduction 
D) meiosis and sexual reproduction 
E) mitosis and sexual reproduction

Question 20

A diploid cell with 6 chromosomes would produce which of the following after meiosis?

Accepted Answer

A) Four genetically-distinct types of haploid gametes 
B) Two genetically-distinct types of diploid gametes 
C) Four genetically-distinct types of diploid gametes 
D) Eight genetically-distinct types of haploid gametes 
E) Eight genetically-identical haploid gametes 
A) Four genetically-distinct types of haploid gametes 
B) Two genetically-distinct types of diploid gametes 
C) Four genetically-distinct types of diploid gametes 
D) Eight genetically-distinct types of haploid gametes 
E) Eight genetically-identical haploid gametes

Exam 9: Sexual Reproduction and Meiosis

Sexual reproduction and meiosis generate genetic variety by

A diploid cell with 4 chromosomes would produce which of the following after meiosis?

Why does sexual reproduction produce more genetic variability in a population?

In meiosis,DNA replicates during

Diploid means having

If a human zygote has either 45 or 47 chromosomes it was caused by random fertilization.

A diploid germ cell will produce cells that have reduced the chromosome number by half,generating four haploid nuclei in

Homologous chromosomes contain the same ____ but may contain different ____.

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",Tragopogon mirus is a hybrid of T.dubius and T porrifolius.Based on the figure,T.mirus has

Mitotic cell division creates identical copies by replicating a cell's DNA __________ and then dividing ____________.

If you mate a donkey (2n = 62)with a horse (2n = 64)you get a mule.A mule is sterile and cannot produce gametes by meiosis because

Why is it essential that meiosis produce haploid cells?

Meiosis is a process that produces

In humans,the sex of a child is determined by

Which of the following will occur in meiosis but not in mitosis?

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",pollen contains _____ that produce _____.

When a human egg ovulates,it arrests in metaphase II until it is fertilized by a sperm.How many chromosomes are present in the egg at metaphase II?

Chromosomes that look alike and carry the same sequence of genes for the same traits are

What two processes results in genetically-different products?

A diploid cell with 6 chromosomes would produce which of the following after meiosis?

Scientific Study of Life

The Chemistry of Life

Cells

The Energy of Life

Photosynthesis

How Cells Release Energy

DNA Structure and Gene Function

DNA Replication and Cell Division

Patterns of Inheritance

DNA Technology

Forces of Evolutionary Change

Evidence of Evolution

Speciation and Extinction

Evolution and Diversity of Microbial Life

Evolution and Diversity of Plants

Evolution and Diversity of Animals

Population Ecology

Communities and Ecosystems

Preserving Biodiversity

Plant Form and Function

Reproduction and Development of Flowering Plants

Animal Tissues and Organ Systems

Nervous System and the Senses

The Endocrine System

The Skeletal and Muscular Systems

The Circulatory and Respiratory Systems

Regulating Temperature, nutrients, and Body Fluids

The Immune System

Animal Reproduction and Development

Filters

Homologous chromosomes contain the same but may contain different .

Mitotic cell division creates identical copies by replicating a cell's DNA and then dividing __.

In the section "Investigating Life: A New Species Is Born,but Who's the Daddy?",pollen contains _ that produce _.