In this post, I am sharing the Class 12 Biology Chapter 22 Short Questions Notes PDF for the students of Intermediate Part 2. This chapter’s name is Variation and Genetics. Students can download the Class 12 Biology Chapter 22 Short Questions Notes PDF on their laptops or mobile. These Biology Notes are for all the boards working under the Punjab Board like Gujranwala Board, Lahore Board, Faisalabad Board, Multan Board, Rawalpindi Board, Sargodha Board, DG Kahn Board, and Sahiwal Board. Here are the complete FSC 2nd Year Biology Notes PDF chapters.
FSC Part 2 Biology Chapter 22 Short Questions Notes – Variation and Genetics
What is meant by zigzag pattern in haemophilia?
Haemophilia A and B show zigzag pattern. It is transferred from maternal grandfather to a grandson through a carreir daughter. It never passes direct from father to son.
The allele of Haemophilia adversely affected the family of Queen Victoria? What is the solution of such genetic diseases?
The only solution of these diseases and abnormalities is cross marriages. There should be no cousin marriiages. Cross marriage can suppress the affects of such alleles.
Give the basis of colour formation in our vision.
Noraml trichromatic colour vision is based on three cones in eye. Each cone is sensitive to only one of the three primary colours, red, green or blue. Each type of cone cell has specific light absorbing protiens called opsins.
What are Opsins? What is their function?
Each type of cone cell of the age has specific light absorbing protiens called opsins.
What is dichromate?
A dichromate can perceive two primary colurs. But it is unable to see the third colour. The opsins of this colour are missing due to mutation.
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