Q22 of 27 Page 1

A 17-year old boy is suffering from high fever with profuse sweating and chills. Choose the correct option from the following diseases which explains these symptoms and rule out the rest with adequate reasons.

(a) Typhoid (b) Viral Fever (c) Malaria

High fever, profuse sweating and chills are symptoms of Malaria. Malaria is caused by Plasmodium which enters the human body through the bite of a female Anopheles mosquito. The parasites multiply in liver cells and attack RBC resulting in their rupture. This is associated with the release of a toxin, haemozoin which is responsible for chill and high fever.

Symptoms of viral fever include chills, sweating, dehydration, headache, loss of appetite etc.


Symptoms of typhoid include high fever, weakness, stomach pain, constipation, headache and loss of appetite.


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As a biologist explain the technique to a dairy farmer for increasing the yield of herd size of cattle in a short time.

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The Indian Government refuted the attempt by a multinational company (MNC) to patent the antiseptic property of curcumin derived from Turmeric. Analyze the unethical practice adopted by the MNC, state its implications and suggest provisions in the Indian Law prevent such malpractices.

 23

Study the given pedigree chart and answer the questions that follow:


(a) Is the trait recessive or dominant?


(b) Is the trait sex-linked or autosomal?


(c) Give the genotypes of the parents shown in generation I and their third child shown in generation II and the first grandchild shown in generation III.


OR


Haemophilia is a sex-linked recessive disorder of humans. The pedigree chart given below shows the inheritance of Haemophilia in one family. Study the pattern of inheritance and answer the questions given.


pedigree.png


(a) Give all the possible genotypes of the members 4, 5 and 6 in the pedigree chart.


(b) A blood test shows that the individual 14 is a carrier of haemophilia. The member numbered 15 has recently married the member numbered 14. What is the probability that their first child will be a haemophilic male.? Show with the help of Punnett square.

 24

(a) In a pond, there were 200 frogs. 40 more were born in the year. Calculate the birth rate of the population.

(b) Population in terms of number is not always a necessary parameter to measure population density. Justify with two examples.