science 9 mitosis

Question 1

what is mitosis

Answer 1

mitosis is the process of cell division and replication .

Question 2

what happens in prophase -

Answer 2

chromatin condenses into chromosomes and centrioles separate spindle fibers and the nuckleur envelope breaks down .

Question 3

what happens in metaphase

Answer 3

the chromosomes line up across the center of the cell and each chromosome is connected to a spindle fiber at its centromere .

Question 4

what happens in anaphase

Answer 4

the sister chromatids separate into individual chromosomes and are moved apart . the spindle fibers become shorter .

Question 5

telophase

Answer 5

the chromosomes gather at ends of the cell and lose their distinct shapes . two new nuclear envelopes will form .

Question 6

the g1 phase is a phase where __________________________ cells will ______–
and synthesize new _______

Answer 6

thq G1 phase is the period of activity where cells do most of their growing cells will increase in size and synthesize new proteins and organelles.

Question 7

the s phase does

Answer 7

dna synthesis . it also duplicates a structure called the centromere . The centromeres help seperate dna during the m phase

Question 8

During the g2 phase many of the organelles and molecules required for ______________ when g2 is completed the cell is ready to enter the _____________________

Answer 8

duringthe g2 phase many of the organelles and molecules required for cell division are produced when g2 is completed the cell is ready to enter the _mphase __( mitosis )

Question 9

how long is a cell in interphase

Answer 9

80% of the time

Question 10

humans have ____ chromosomes found in the nuclei

Answer 10

46

Question 11

what is mitosis

Answer 11

mitosis is a type of cell division in which one cell ( the parent ) divides to produce two new cells ( the daughters ) that are genetically identical to itself

Question 12

what is the difference between plant and animal cells

Answer 12

plant cells have chloroplasts and a cell wall which animal cells dont

Question 13

what happens in cytokinesis

Answer 13

• the cytoplasm pinches in half

- each daughter cell has an idential set to duplicat chromosomes

Question 14

what are some of the ways that cells die ?

Answer 14

infections , damage by cuts , bruises , breaks or possibly cancer

Question 15

differences in mitosis in animal and plant cells

Answer 15

animal cells use cleavage furrow to create new cells while plant cells use a cell plate that grows between the nuclei creating 2 new daughter cells