Question 1

About 1 male in 1,000 is born with two Y chromosomes and one X chromosome, a condition known as _________syndrome.

Accepted Answer

Jacob

Question 2

A couple already has 9 children, and they are all girls. If they decide to have a 10th child, it has a 50% chance that it will be male and a 50% chance that it will be female.

Accepted Answer

A) True 
 B)False  True

Question 3

The different forms of a gene-for example, those responsible for eye color-are called

Accepted Answer

A)   cyclins.
B)   alleles.
C)   sister chromatids.
D)   telomeres.
E)   receptors. B

Question 4

An extra copy of chromosome 21, a condition called_________ syndrome, occurs in about 1 of every 700 births, although this rate varies tremendously with the age of the parents.

Accepted Answer

The answer of An extra copy of chromosome 21, a...

Question 5

Mutations may be detrimental, beneficial, or neutral to the cell or organism in which they occur.

Accepted Answer

A) True 
 B)False

Question 6

Sister chromatids are also referred to as homologues or homologous chromosomes.

Accepted Answer

A) True 
 B)False

Question 7

Asexually produced daughter cells are

Accepted Answer

A)   identical to each other.
B)   different from each other.
C)   different from parental cell.
D)   identical to the parental cell.
E)   identical to each other and to the parental cell.

Question 8

How many total daughter cells are produced from each parent cell as a result of meiosis?

Accepted Answer

A)   Millions
B)   One
C)   Four
D)   Two

Question 9

How does meiotic cell division produce genetically variable, haploid cells?

Accepted Answer

The answer of How does meiotic cell division produce genetically...

Question 10

How does sexual reproduction produce genetic variability?

Accepted Answer

The answer of How does sexual reproduction produce genetic variability?...

Question 11

When gametes fuse during fertilization, a(n) _________is produced.

Accepted Answer

A)   egg
B)   haploid individual
C)   sperm
D)   zygote

Question 12

For the question below, suppose that the somatic cells of humanoid X contain a total of 4 chromosomes [2N = 4] (or 2 pairs of chromosomes, [N = 2]).
How many chromatids and chromosomes are present at the following stages of MEIOSIS? Answers should be filled in for the blank spaces in the table below.

Accepted Answer

The answer of For the question below, suppose that the...

Question 13

Crossing over

Accepted Answer

A)   is followed immediately by separation of each of the chromatids.
B)   increases variability in gametes.
C)   occurs between sister chromatids.
D)   prevents genetic recombination.
E)   results in only one exchange per homologue.

Question 14

Homologous chromosomes

Accepted Answer

A)   may exchange parts during meiosis.
B)   pair up during meiosis.
C)   are in pairs, one chromosome of each pair from the father and one from the mother.
D)   have alleles for the same characteristics even though the gene expression may not be the same.
E)   All of the choices are correct.

Question 15

Occasional errors occur during meiosis, resulting in gametes that have too many or too few chromosomes. Such errors in meiosis, called_________ , can affect the number of sex chromosomes or autosomes in a gamete

Accepted Answer

The answer of Occasional errors occur during meiosis, resulting in...

Question 16

The process of meiosis

Accepted Answer

A)   begins with diploid cells and ends with diploid cells.
B)   begins with haploid cells and ends with diploid cells.
C)   begins with diploid cells and ends with haploid cells.
D)   begins with haploid cells and ends with haploid cells.

Question 17

Meiotic cell division in animals occurs in the__________ and results in the production of_________ .

Accepted Answer

A)   testes and ovaries; diploid cells
B)   testes and ovaries; gametes
C)   body cells; daughter cells
D)   body cells; parent cells

Question 18

Four of the five answers listed below are haploid. Select the exception.

Accepted Answer

A)   Zygote
B)   Gametophyte
C)   Egg
D)   Meiospore
E)   Sperm

Question 19

How many haploid cells are produced by one diploid cell during meiosis?

Accepted Answer

A)   One
B)   8 million
C)   Two
D)   Four

Question 20

Sperm and egg fuse to form a diploid fertilized egg, called a_________.

Accepted Answer

The answer of Sperm and egg fuse to form a...

Exam 10: Meiosis: the Basis of Sexual Reproduction