Saturday, October 24, 2020

2018 SAY (June) | HSE +2 Exam | Zoology Question Paper


(Maximum: 30 Scores)

Answer all the following questions from I to 3. Each question carries I Score. (3 x 1=3)

1. Number of spermatids produced from 25 primary spermatocytes are

a. 25
b. 50
c. 100
d. 250

2. Study the relationship between the first two words and till the blank space with a suitable word.

Sterilization in male: Vasectomy
Sterilization in female: ..................

3. Identity the bacterial disease from the following:

a. Typhoid
b. Amoebiasis
c. Malaria
d. Filariasis

Answer any 9 from the questions 4-14. Each carries 2 Scores. (9 x 2 = 18)

4. The incidence of STDs is reported more among the age group between 15-24 years.

a. What are STDs?
b. Suggest methods to prevent STDs.

5. Observe the following cross between heterozygous dominant progeny and homozygous recessive parent. Answer the following questions. 

a. Identify the cross.
b. Mention the significance of this cross.

6. Following diagram shows amino acid sequences of a part of b-chain of Haemoglobin of two individuals. Observe the amino acid sequence and answer the following questions: 

a. Which among the above indicates sickle cell anaemic condition?
b. Justify your answer.
c. Describe what is single base substitution.

7. 'Human genome project is a mega project" Give two reasons to explain this.

8. Observe the diagram and answer the following questions: 

a. Identify the diagram.
b. Name the enzymes A, B and C.

9. In sewage treatment plants microbes play a significant role. Distinguish between primary and secondary treatment in sewage plants.

10. Human beings can conserve and protect our ecosystem and biodiversity. Prepare a handout to show different Biodiversity conservation.

11. "Genetic code is universal in nature"

a. Substantiate this statement.
b. Mention any two other salient features of genetic code.

12. p2 + 2pq + q2 = 1 is the gene frequency of a population showing an evolutionary principle.

a. Name the principle.
b. Enlist any three factors affecting this principle.

13. The blood group of a child is ‘O’. His father is with 'A' blood group and mother with 'B' blood group. Write down the genotype of the child and genotypes of parents.


 Above homologous organs provide evidence for a particular type of evolution.

a. Identify the type of evolution.
b. What do you mean by homologous organs.

(Q. 15 to 18). Answer any three. Each carries 3 scores.

15. Match the columns B & C with column A.











Graafian follicle


16. Prepare a flowchart •of evolution of man in descending order by choosing the names given below:

Homo sapiens, Homo erectus. Homo habilis, Austrapithecines, Ramapithicus, Neanderthal 

17. Classify the following barriers of innate immunity under three suitable headings:

Skin, Saliva, WBC, Monocyte, Mucus, Acid of stomach 

18. Expand the following:

a. SNP
b. BAC
c. YAC

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