Your SlideShare is downloading. ×
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
04 Phenotype Change Mutation and Environment
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

04 Phenotype Change Mutation and Environment

1,457

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
1,457
On Slideshare
0
From Embeds
0
Number of Embeds
14
Actions
Shares
0
Downloads
7
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Phenotype affected by mutations• Mutation – an unpredictable change in the genetic material of an organism• Gene mutation – change in the structure of a DNA molecule, producing a different allele of a gene• Chromosome mutation – changes in the structure or number of whole chromosomes in a cell ALBIO9700/2006JK
  • 2. Mutation factors (mutagen):• Ionising radiation (alpha, beta and gamma radiation)• Ultraviolet radiation• Chemicals (mustard gas) ALBIO9700/2006JK
  • 3. Types of mutations• Base substitution Silent mutation eg. CCT GAG GAG to CCT GTG GAG• Base addition eg. CCT GAG GAG to CCA TGA GGA G Frame shift• Base deletion eg. CCT GAG GAG to CCG AGG AG ALBIO9700/2006JK
  • 4. ALBIO9700/2006JK
  • 5. Examples of phenotype change caused by mutation• Sickle cell anaemia• Phenylketonuria ALBIO9700/2006JK
  • 6. ALBIO9700/2006JK
  • 7. Phenotype affected by environment• Genotype of the organism does not always affect its phenotype in the same way• Eg. i) Human height ii) Dark tips to ears, nose, paws and tail in the Himalayan colouring in rabbits iii) lac operon in Escherichia coli ALBIO9700/2006JK
  • 8. ALBIO9700/2006JK
  • 9. ALBIO9700/2006JK
  • 10. ALBIO9700/2006JK

×