Science Unit 3

Question 1

the name of the structure that connets two sister chromatid

Answer 1

centromere

Question 2

last step of cell division

Answer 2

cytokinesis

Question 3

how many cells are produced at the end of mitosis

Answer 3

2

Question 4

mitosis only occurs in this type of cell…

Answer 4

body cells

Question 5

chromosomes reach the poles in this phase

Answer 5

telophase

Question 6

the cleavage furrow appears splitting the cell in two during this phase

Answer 6

telophase

Question 7

the number of cells produced during meiosis…

Answer 7

4

Question 8

_____ cells have homologous pairs of chromosomes

Answer 8

diploid

Question 9

another name for sex cells

Answer 9

gametes

Question 10

the threadlike DNA in the nucleus is called

Answer 10

chromatin

Question 11

how many stages are in the cell cycle?

Answer 11

3-interphase,mitosis,cytokinesis

Question 12

____ cells have only one of each pair of chromosomes

Answer 12

haploid

Question 13

what is the purpose of mitosis?

Answer 13

to build and repair your body

Question 14

deoxyribonucleic acid, a molecule that is present in all living cells and that contains the information that determines the traits that a living thing inherits and needs to live

Answer 14

DNA

Question 15

the period of the cell cycle during which activities such as cell growth and protein synthesis occur

Answer 15

interphase

Question 16

in a eukaryote cell, one of the structures in the nucleus that are made up of DNA and protein; in a prokaryote cell, the main ring of DNA

Answer 16

chromosomes

Question 17

in eukaryote cells, a process of cell division that forms two new nuclei, each of which has the same number of chromosomes

Answer 17

mitosis

Question 18

the life cycle of a cell

Answer 18

cell cycle

Question 19

the division of the cytoplasm of a cell

Answer 19

cytokinesis

Question 20

made up of DNA and proteins

Answer 20

chromatin

Question 21

a duplicated chromsomes consists of two identical structures

Answer 21

chromatid

Question 22

the region of a chromosome to which the microtubes of the spindle attach

Answer 22

centromere

Question 23

chromosomes that have the same sequence of genes and the same structure

Answer 23

homologous chromosome

Question 24

a process in a cell division during which the number of chromosomes decreases to half the original number by two divisions of the nucleus, which results in the production of sex cells

Answer 24

meiosis

Question 25

cells with a pair of every chromosome

Answer 25

diploid

Question 26

a haploid reproductive cell that unites with another haploid reproductive cell to form a zygote

Answer 26

gametes

Question 27

cells that contain half the usual number of chromosomes

Answer 27

haploid

Question 28

reproduction in which the sex cells from two parents unite to produce offspring that share traits from both parents

Answer 28

sexual reproduction

Question 29

reproduction that does not involve the union of sex cells and in which one parent produces offspring that are genetically identical to the parent

Answer 29

asexual reproduction

Question 30

the form of asexual reproduction in prokaryotes. it is a cell division

Answer 30

binary fission

Question 31

a specialized cell that can survive harsh conditions. Both prokaryotes and eukaryotes can form these.

Answer 31

spore

Question 32

a form of asexual reproduction occuring in plants

Answer 32

vegetative reproduction

Question 33

daughter cells are NOT identical to the parent in...

Answer 33

meiosis

Question 34

in humans, # of chromosomes parent at the end of meiosis

Answer 34

23

Question 35

what is the purpose of meiosis?

Answer 35

to produce sex cells

Question 36

a disease caused by uncontrolled cell growth

Answer 36

cancer

Question 37

crossing over occurs in...

Answer 37

meiosis

Question 38

centrioles appear to move to the opposite side of the cell during...

Answer 38

prophase

Question 39

chromosomes condense and the nuclear membrane breaks down during

Answer 39

prophase

Question 40

two new nuclei are formed. Chromosomes begin to uncoil. Spindle fibers breaks down during...

Answer 40

telophase

Question 41

an organism develops tiny buds on its body, it is the result of mitosis

Answer 41

spore

Question 42

gametes with different allele combinations

Answer 42

resulting cells

Question 43

same genes different alles

Answer 43

homologs

Question 44

contains four chromatids and alternative

Answer 44

tetrads

Question 45

form of a gene

Answer 45

alleles

Question 46

crossing over happens in...

Answer 46

prophase