Written by students who passed Immediately available after payment Read online or as PDF Wrong document? Swap it for free 4.6 TrustPilot
logo-home
Document preview thumbnail
Preview 1 out of 2 pages
Summary

Summary Alevel OCR Biology A notes on Cell Division

Document preview thumbnail
Preview 1 out of 2 pages

Alevel OCR Biology A notes on Cell Division from an A* biology student.

Content preview

nuclear
↳ miNsis
division all
duson
gloliness
sphase =


62
DNA replication
-
7
m

cell division Interphase
61
phase of
-




cycling trigger movement from each thea l l cycle.

-Interphase G,
=
=
cells make RNA, enzymes other proting
+
for growth
growth of
=S phase DNA nucleus
multicellent
retr replicates
in
=




G2
=




replace cells cell continues to
glow new DNA
synthesised checked, error repaired
=
+
is

and repair r

tissues
Mitosis 1 genetically identical daughter
-




ally produced
=




L
asexual
=

Prophase chromosomes condence, I sister chromatics join at centromere, a controsomes
=




reproduction
move to opposite poles, spindle fibres emerge from centrosomes, ruler envelope

break down into small locks, wallows disappeal

-Metaphase: aurrosaries at opposite
poles, spindle fibres extend, chromosomes line
up at



equator, spindle fibres attach to centromeres


=

Anaphase =
sister chromatic separate
at centromere, spiridle fibres shown, chromosomes


to
pullace opposite
poles.


=Telophase chronoscres decondence, nuclear envelopes reform around each of chromo-
=


set



scree, spindle fibres break down, new nucleoliform each
in all


-




checkpoints
DNA DNA
=
ceded for errors



=proot reading +
repair enzymes


=During G, chromosomes ceded for damage, damage:t o s
phase until repaired
=




During Sphase chromosomes declect been replicated, replication
-

=

to ensure theyve

cell
insuccesful: cycle stopped.

=During 62 damage check after
phase:additional DNA occurs replication,
DNA
cycle

delayed until repair made.



-During final check:
metaphase: chromosomes
correctly attached to spiridle fibres prior

anaphase.
to




Meiosis= diploid
-




nuclear division= ->
haploid cells gametes for sexual reproduction
-




=Prophase I dna
=



concesses, nuclear envelope break down, spindles form, crossing our



=Metaphase I line up at
=



equator, maternal paternal
+
chronosces each
in pair position


differently (independent assortment).
dont divide.
=




I :chromosomes
Anaphase separated, centromeres


-Telophase I "same"
=




cytolinesis
-
=
cytoplasm dision, a haploid cells

Connected book
 image
Publisher: september 2015 ISBN: 9780198351924 Edition: 1

Document information

Study Level
Subject
Summarized whole book?
Unknown
Uploaded on
July 1, 2023
Number of pages
2
Written in
2022/2023
Type
Summary
£3.99

Wrong document? Swap it for free Within 14 days of purchase and before downloading, you can choose a different document. You can simply spend the amount again.
Written by students who passed
Immediately available after payment
Read online or as PDF

Sold
0
Followers
0
Items
16
Last sold
-


Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their exams and reviewed by others who've used these revision notes.

Didn't get what you expected? Choose another document

No problem! You can straightaway pick a different document that better suits what you're after.

Pay as you like, start learning straight away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and smashed it. It really can be that simple.”

Alisha Student

Working on your references?

Create accurate citations in APA, MLA and Harvard with our free citation generator.

Working on your references?

Frequently asked questions