importance of mitosis

Question 1

importances

Answer 1

growth
repair
maintaining chromosome number

Question 2

growth

Answer 2

mitosis duplicates cells so that the animal can grow

Question 3

repair

Answer 3

mitosis duplicates cells so that the destroyed tissues or muscles can be rebuilt / repaired

Question 4

maintaining chromosome number

Answer 4

the animal will remain with 23 sets of 2 chromosomes, the 23rd determining gender. If there are more or less the animal will suffer from a syndrome such a down-syndrome or Trisomy 18. diploid being 2n (2 times 23) haploid being n (23).

Question 5

processes

Answer 5

IPMAT

• interphase
• prophase
• metaphase
• anaphase
• Telophase

Question 6

interphase

Answer 6

first phase of mitosis -

• longest stage
• cells grow continue on perform normal metabolic functions
• replication of DNA occurs
• chromosomes are visible as a chromatin network in nucleus

Question 7

Prophase

Answer 7

2nd phase of mitosis-

• chromosomes condense and become visible
• nuclear envelope disappears / dissolves
• centrioles move to opposite ends
• spindle fibers form between centrioles

Question 8

metaphase

Answer 8

3rd phase of mitosis -

• chromosomes line up at equator
• chromosomes become attached to the spindle fibres

Question 9

anaphase

Answer 9

4th phase of mitosis -

- spindle fibres contract

Question 10

cytokinesis

Answer 10

mid 4th phase -

- the spindle fibers attached to the cytoplasm begin to contracts forming a cleavage furrow

Question 11

telophase

Answer 11

5th phase of mitosis -

• chromatids reach separate poles
• new membrane forms around the chromatids
• spindle fibers break down
• chromatids split into chromosomes
• chromosomes unwind becoming chromatin
• chromosomes are identical to parents