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Summary Cloning and biotechnology notes for A level Biology OCR $9.40   Add to cart

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Summary Cloning and biotechnology notes for A level Biology OCR

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In depth revision notes covering the whole of cloning and biotechnology. The topic is broken down into the individual specification points, shown by the numbers used throughout.

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  • Cloning and biotechnology
  • August 6, 2024
  • 14
  • 2022/2023
  • Summary
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, CLONING & BIOTECH
coming
beaut
Vegetative propagation
· Asexual reproduction in plants (natural
dowing
4) e .

Strawberry plants
.
g . They produce runners
(long stems) that grow sideways across the
ground . At points along the runner new shoots/ ,

roots grow , becoming new
genetically
identical strawberry plants. The new plant
cal be propegated from the ster , leaf bud
or root of the parent plant
.




Examples :
Involves
·
pereating organs which can store
food remain dormant also helps them to

longer through growing seasons).
-



survwe
daffodil bulbs-leaf bases store food Swell
,
·




buds form internally to grow in the next
Season
·
spider plants-form runners
·
marram grass-rhizomes are a specialised
horizontal sterk
running underground ,
swollen
with storedfood , buds Shoots form from this
ruizome + become new plants .
·
potato-base of the stur underground form a
tuber with stored food, buds develop on the
tuber
methods :

plants are cloned using ;
· A non-flowering stem
·
An oblique cut in the stem-between 2 leaf
·
Hormone roothing Powder nodes




(
&
Reduce leaves to 2 or 4
#
keep the cuting well watered
cover cutting with a plastic bag for a
S


·




few days
The base of the plant is submerged
ii this to
encourage the tissues in the
ster to
develop into new roots
.

Benefits Risks

·
No genetic >
- could lead to
variation disease
& except mutation) susceptibility
·
offspring Can't colonise
·
&




adapted to un new
No new
areas
alleles
·




environment

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