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Exam (elaborations)

16 Inherited Change (diagrams, key points, summary)

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Scored an A* | A Level Biology notes with contents arranged according to the learner guide. Contains diagrams, easily understood by visual learners. Consists of key points, not too further elaborated, short, concise and straight to the point to equip you for the exam.

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  • August 27, 2020
  • 26
  • 2019/2020
  • Exam (elaborations)
  • Only questions

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By: jin0315hd • 2 year ago

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By: Devis • 3 year ago

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Inherited Change
CIE A LEVEL BIOLOGY




Jia Xuan
by

,CHROMOSOMES
KEY TERMS

Homologous chromosomes → chromosomes with .
same size I length
• same shape
.
same banding pattern
• same order of loci

→ chromosomes up in prophase I
pair




ftp.oioi
t
Sexual reproduction




g
I. ad !!!
" 's
"" "


which contains only one set of
Chromosomes

.




9mYYotYg Diploid ( 2n )
Lr> which




\ ¥
A cell contains two sets of
"
chromosomes .




2n
Fertilisation




GAMETOGENESIS

Gametogenesis of

production gametes
Tex cells for fertilisation




✓ production of
in humans eggs
-
/ production of sperm

Gametogenesis
\ in plants -
- production of
pollen grains
production of
embryo sac

, HUMANS



IN OOGENESIS LIM




1
oogenesis → The
production of eggs Ova in the ovaries




MITOSIS diploid




I t
I
" ro :


Yff I 1
)
GROWTH




MEIOSIS
V
diploid
primary oocyte
(
produced in
embryo )


#p -

v v
Secondary oocyte ⑧ haploid
( after puberty) polar body


#p v

secondary oocyte
( once a month )




\!
" "" """ °"




polar body

ovum
haploid

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