Review


 ______ and
______ cells are sex cells.


 egg, sperm


 ____ produces two identical cells.


 Mitosis


 A(n) _____ is the code for a protein.

 gene



 A(n) _____ sperm is formed during meiosis.


 haploid


 Budding is a type of _____.


 asexual reproduction


 A(n) _____ is a structure in the nucleus that contains hereditary material.


 chromosome


 _____ produces four sex cells.


 Meiosis


 An error made during the copying of DNA is called a(n) _____.


 mutation


 As different as a lizard, a great white shark, and an eggplant are, they are all made of _____.

 cells



 The series of events that take place from one cell division to the next is called the _____.


 cell cycle


 After interphase, _____ begins.
 a. cell death
 b. cell division
 c. cell consumption
 d. cell erosion

 B



 Cells in your body that no longer divide are always in _____.


 interphase


 The process in which the nucleus divides to form two identical nuclei is known as
_____.


 mitosis


 In asexual reproduction, the new organism will have hereditary material that is ____ the parent organism.


 identical to


 All of the following are true of animal and plant cells during mitosis
EXCEPT _____.
 a. only animals have spindle fibers
 only plants have rigid cell walls
 only plants form cell plates
 only animals have centrioles

 A



 All of the following are composed of body cells EXCEPT
____.
 a. bone
 b. kidney
 c. liver
 d. sperm

 D



 Each human skin cell has ____ pairs of chromosomes.

 23



 Human sex cells have ____ individual chromosomes.

 23



 In sexual reproduction, a new organism is produced when ___.
 a. cell divide by mitosis
 b. sex cells combine
 c. an organism divides into two equal parts
 d. a new organism grows from the body of its parent

 B



 In ____, a new organism grows from the body of the parent organism.


 budding


 The number of chromosomes in a sex cell of an organism is its ___ chromosome number.


 haploid


 At the end of meiosis, ___ cells have been produced from one cell.

 4



 Proteins are made of units called ___, which are linked together in a specific order.


 amino acids


 The code for making proteins is cared to the ribosomes by ___.


 mRNA


 In DNA, adenine always pairs with ___.


 thymine


 For most cells, after the nucleus has divided, ___ separates and two new cells are formed.


 cytoplasm


 During prophase, the pairs of ____ are fully visible when viewed under a microscope.


 chromatids


 Organisms with eukaryotic cells asexually reproduce by ____.


 cell division


 The cell that forms as a result of fertilization is known as a _____.


 zygote


 Because sex cells do not have pairs of chromosomes, they are said to be ____.


 haploid


 Before mitosis begins, each ____ is duplicated.


 chromosome

True/False

 Regeneration is the process that uses cell division to regrow body parts.

 True



 During asexual reproduction two sex cells, sometimes called an egg and a sperm, come together.

 False



 sexual reproduction


 Sex cells have half the number of chromosomes as body cells.

 True



 Haploid sex cells are produced by a process called meiosis.

 True



 Organisms with three, four, or more sets of chromosomes are known as haploid organisms.

 False



 polypoid


 Every cell that has ever been formed in your body, or in any other organism’s body, contains DNA.

 True



 DNA stands for deoxyribonucleic acid.

 True



 RNA is made in the nucleus on a DNA pattern.

 True



 Sex cells have half the number of chromosomes that body cells have.

 True



 Haploid sex cells are produced by meiosis.

 True



 Organisms with three sets of chromosomes are known as haploid organisms.

 False



 triploid

Multiple Answers

 Lists the phased of
Mitosis in order.


 prophase, metaphase, anaphase, telephase


 List the types of RNA. (you may not use the abbreviations)


 List the nitrogen bases.

 adenine

 thymine
 cytosine
 guanine