During a medical investigation, an infant was found to possess an extra chromosome 21. Decribe the symptoms the child is likely to develop later in the life.
An additional copy of chromosome number 21 (trisomy of chromosome number 21) in humans results in Down’s syndrome.Following characteristic symptoms are likely to develop in the child due to the above mentioned conditions:
(i) Short statured with small, round head.
(ii) Furrowed tongue and partially open mouth.
(iii) Broad palm with characteristics palm crease.
(iv) Slow mental, physical and psychomotor development.
Explain the role(s) of the following in biotechnology.
(a) Restriction endonuclease
(b) Gel-electrophoresis
(c) Selectable markers in pBR322
A number of passengers were severely burnt beyond recognition during a train accident. Name and describe a modern technique that can help hand over the dead to their relatives.
(a) List the three states the annuals and biennial angiosperms have to pass through during their life cycle.
(b) List and describe any two vegetative propagules in flowering plants.
(a) What precaution(s) would you recommend to a patient requiring repeated blood transfusion?
(b) If the advise is not followed by the patient there is an apprehension that the patient might contract a disease that would destroy the immune system of his/her body. Explain with the help of schematic diagram only how the immune system would get affected and destroyed.
(a) What is inbreeding depression?
(b) Explain the importance of ‘selection’ during inbreeding in cattle.
