Question 1

Refer to the figure below, and then answer the question that follows.
 
-If crossing over occurs as shown in the figure above,which of the following is true?

Accepted Answer

A) Sister chromatids exchange genetic material during crossing over. 
B) The result of crossing over is four genetically identical chromatids. 
C) The result of crossing over is four genetically different chromatids. 
D) The resulting chromatids all have a combination of maternal and paternal genetic material. 
E) The resulting chromatids either have only maternal genetic material or paternal genetic material.

Question 2

From an evolutionary perspective,why is sexual reproduction advantageous over asexual reproduction?

Accepted Answer

A) Sexual reproduction is faster and easier than asexual reproduction. 
B) Asexual reproduction minimizes differences, so natural selection can act more easily. 
C) Sexual reproduction produces greater genetic diversity than asexual reproduction. 
D) Sexual reproduction produces less genetic diversity than asexual reproduction.

Question 3

How many chromosomes are in a human gamete?

Accepted Answer

A) 43 
B) 42 
C) 26 
D) 23 
E) 46

Question 4

Refer to the figure below, and then answer the question that follows.
 
-A difference between spermatogenesis and oogenesis is:

Accepted Answer

A) sperm are produced after meiosis II, but an egg is produced after meiosis I. 
B) spermatids all have the same amount of genetic material, but polar bodies have less genetic material then the egg. 
C) meiosis produces four sperm but only one egg. 
D) sperm are haploid, but eggs are diploid. 
E) a primary oocyte has more genetic material than a primary spermatocyte.

Question 5

A 2n cell from an organism has 40 chromosomes.How many chromosomes would be in a haploid gamete from this organism?

Accepted Answer

A) 46 
B) 80 
C) 10 
D) 40 
E) 20

Question 6

Explain why a life cycle that includes meiosis must also include fertilization.What is the advantage of such a life cycle?

Accepted Answer

The answer of Explain why a life cycle that includes...

Question 7

In gamete formation,the starting cells in females are the ________,and the starting cells in males are ________.

Accepted Answer

A) primary oocytes; prmary spermatocytes 
B) primary spermatocytes; primary oocytes 
C) oogonia; spermatogonia 
D) spermatogonia; oogonia 
E) ooctyes; spermatids

Question 8

The number of chromosomes present in a human cell at anaphase of mitosis and anaphase of meiosis II is the same.

Accepted Answer

A) True 
 B)False

Question 9

Homologous chromosomes pair up to form a structure called a:

Accepted Answer

A) sister chromatid. 
B) tetrad. 
C) homologue. 
D) haploid.

Question 10

________ have both male and female reproductive parts.

Accepted Answer

The answer of ________ have both male and female reproductive...

Question 11

In a human cell that is haploid,how many chromosomes are there? How many are autosomes,and how many are sex chromosomes?

Accepted Answer

A) 45 chromosomes: 44 autosomes and 1 sex chromosome 
B) 46 chromosomes: 44 autosomes and 2 sex chromosomes 
C) 23 chromosomes: 22 autosomes and 1 sex chromosome 
D) 11 chromosomes: 11 autosomes and no sex chromosomes 
E) 12 chromosomes: 11 autosomes and 1 sex chromosome

Question 12

Imagine that a species has eight chromosomes (four homologous pairs).If some event occurred that prevented meiosis from occurring after replication,how many chromosomes would this species have after two generations?

Accepted Answer

A) 64 
B) 8 
C) 32 
D) 16 
E) 4

Question 13

You have homologous pairs of chromosomes in each of your cells.In what way are these pairs of chromosomes identical?

Accepted Answer

A) They have exactly the same genes. 
B) They both come from the same parent. 
C) They have genes for the same traits. 
D) They will stay together during meiosis.

Question 14

A human egg contains:

Accepted Answer

A) 23 autosomes and an X or a Y chromosome. 
B) 22 autosomes and an X or a Y chromosome. 
C) 46 chromosomes, as 23 pairs. 
D) 22 pairs of autosomes and two X chromosomes. 
E) 22 autosomes and one X chromosome.

Question 15

Once produced,a zygote will divide by ________ to develop into a whole organism.

Accepted Answer

The answer of Once produced,a zygote will divide by ________...

Question 16

The number of chromosomes present in a cell in metaphase I and metaphase II is the same.

Accepted Answer

A) True 
 B)False

Question 17

A gamete from a human male contains:

Accepted Answer

A) 23 autosomes and an X chromosome. 
B) 22 autosomes, one X chromosome, and one Y chromosome. 
C) 23 autosomes and either an X or a Y chromosome. 
D) 23 autosomes and a Y chromosome. 
E) 22 autosomes and either an X or a Y chromosome.

Question 18

What event occurs in both anaphase of mitosis and anaphase II of meiosis II?

Accepted Answer

A) Cytokinesis ends. 
B) Homologous chromosomes separate. 
C) Chromatin decondenses. 
D) Homologous chromosomes pair. 
E) Sister chromatids separate.

Question 19

How are the products of meiosis and the products of mitosis different?

Accepted Answer

A) The products of mitosis are gametes. 
B) The products of mitosis are always haploid. 
C) The products of meiosis are genetically identical to each other. 
D) The products of meiosis are gametes. 
E) The products of meiosis are always diploid.

Question 20

What is the result of independent assortment during meiosis?

Accepted Answer

A) The cells that result have either all maternal or all paternal chromosomes. 
B) Parts of homologous chromosomes are exchanged. 
C) Both copies of a sister chromatid pair end up in the same gamete. 
D) The cells that result are genetically identical to each other. 
E) Genetically diverse gametes are produced.

Exam 10: Preparing for Sexual Reproduction: Meiosis

Refer to the figure below, and then answer the question that follows. -If crossing over occurs as shown in the figure above,which of the following is true?