HARD
12th CBSE
IMPORTANT
Earn 100

A woman with '0 blood group' marries a man with 'AB blood group'.
Work out the cross to show all the possible phenotypes and genotypes of the progeny with respect to blood groups. Explain the pattern of inheritance observed in this cross.

Important Questions on Model Question Papers 2

MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 21
Secondary treatment of the sewage is also called biological treatment. Justify this statement and explain the process.
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 21
Plant breeding technique has helped the sugar industry in North India. Explain how.
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 22
(a) Name the causative organisms for the following diseases:
       (i) Elephantiasis    (ii) Ringworm    (iii) Amoebiasis
(b) How can public hygiene help control such diseases?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 23
Explain the role(s) of the following in biotechnology:
(a)    Restriction endonuclease
(b)    Gel-electrophoresis
(c)    Selectable markers in pBR322.
 
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 24
Write the steps you would suggest to be undertaken to obtain a foreign-gene-product.
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 25
(a) Draw a diagrammatic sectional view of human ovary showing different stages of oogenesis
along with corpus luteum.
(b) Where is morula formed in humans? Explain the process of its development from zygote.
 
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 25
Draw a schematic labelled diagram of a fertilised embryo sac of an angiosperm.
Describe the stages in embryo development in a dicot plant.
 
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 26
Explain the process of transcription in a prokaryote.