Cell div / mitosis

Question 1

Where is genetic information in
human body cells?

Answer 1

in the nucleus in the DNA

Question 2

How many chromosomes are there
in a human body cells?

Answer 2

46 chromie , 23 pairs

Question 3

when are chromosomes visible ?

Answer 3

during cell division

Question 4

what does each chromosome consist of?

Answer 4

two chromatids

Question 5

are the genetic information on each chromatid identical ?

Answer 5

True

Question 5

how many chromatids does a chromasome have?

Answer 5

Two

Question 6

Where does the chromatid join?

Answer 6

along the center of the centromere

Question 7

whats a karyotype?

Answer 7

shows the full set
of chromosomes of the person in arranged way

Question 8

How are the chromosomes arranged in a
karyotype?

Answer 8

In pairs, in order of decreasing size.

Question 9

Whats displayed last in a karyotype?

Answer 9

The sex chromosomes

Question 10

What is a gene?

Answer 10

a section of DNA, which carries coding for a particular protein

Question 11

What is the job of genes?

Answer 11

Many genes are needed to carry all the
genetic information for a whole organism

Question 12

What’s the cell cycle?

Answer 12

the sequence of cell growth
and cell division

Question 13

What does the cell cycle include?

Answer 13

1-Interphase

2-Mitosis

3- Cytokinesis

Question 14

What is interphase?

Answer 14

• cell growth
• synthesis of organelles
• DNA copying and checking of genetic information

Question 15

What is mitosis

Answer 15

the formation of two new IDENTICAL
daughter cells from an original cell It is how organisms grow

Question 16

what is cytokinesis?

Answer 16

cytoplasm divided between the daughter cells

Question 17

Mitosis occurs rapidly in a newly formed fertilized egg. Suggest
another situation in the body where you might expect cells to be
actively dividing by mitosis

Answer 17

Mitosis is also needed for the repair and replacement of cells at the site of wound or injury, during growth spurts, during the production of red blood
cells in bone marrow (happens all the time)

Question 18

What types of (body)cells are found throughout the body?

Answer 18

somatic

Question 19

what is an example of a diploid organism and how many copies of chromosomes do they?

Answer 19

humans, two copies of
each chromosome.

Question 20

what are the stages of mitosis?

Answer 20

prophase
metaphase
anaphase
interphase

Question 21

what are the steps in prophase?

Answer 21

prophase: membrane dissipates and chromatins condense and shorten into chromosomes

Question 22

what are the steps in metaphase ?

Answer 22

the chromosomes line up along
the equator attached to spindles by their
centromeres

Question 23

What are the steps in anaphase?

Answer 23

anaphase: chromatids of each double are replicated and pulled toward different poles

Question 24

What are the steps in telophase?

Answer 24

telophase: chromosomes arrive at poles and new membrane is being formed by cytokinesis

Question 25

What are the steps in cytokinesis?

Answer 25

The cytoplasm divides into two and the new cell membrane separates
off to give two new, identical cells (daughter cells

Question 26

What is the function of the CENTRIOLES and the SPINDLE FIBRES?

Answer 26

centrioles are responsible for organizing the microtubules into the spindle apparatus,

spindle fibers (microtubules) play a central role in ensuring the proper distribution of chromosomes during cell division, promoting the accurate separation of genetic material into the daughter cells