Home Assignment Bio XII 2.1.1A - 2.1.3A

Chapter -Principal of Inheritance and Variation

BIO XII 2.1.1 A

Q.1 Why Mendel choose pea plant as an experimental material?

Q. 2. State the following
                                (a) Law of dominance   

                                (b) Law of segregation

Q.3. Define the following terms

a)      Character

b)      Trait

c)       Monohybrid

d)      Dihybrid

e)      Homozygous

f)       Heterozygous

g)      Gene

h)      Allele

i)        Phenotype

j)        Genotype

k)      Karyotype

l)        Dominant

m)    Recessive

Q.4. Mendelian Factors With the help of a flow chart show monohybrid cross & write phenotypic and genotypic ratio obtained in F2 generation.

Q.5. Differentiate between back cross and test cross.

Q.6. Define incomplete dominance. Give an example of monohybrid cross.

Q.7. Define co-dominance with the help of a monohybrid cross.

BIO XII 2.1.2 A

Q.8. Draw the diagram of Punett square of F1 and F2 plants in dihybrid cross. Write phenotypic and genotypic ratios in F2 generation.

Q.9. Define the law of independent assortment.

Q.10. Describe briefly the following types of mechanism of sex determination in organisms with examples:
                                XX-XY Type                         XX-XO Type                                       ZW-ZZ type

Q.11. Name the scientists who postulated Chromosomal theory of Inheritance. Briefly describe this theory.

Q.12. What is linkage and linkage groups?

Q.13. Name the scientist who discovered linkage. Name the organism on which he performed experiments?

BIO XII 2.1.3 A

Q.14. What is Pedigree analysis? Write its three applications.

Q.15. In Sickle cell anaemia Glutamic acid is replaced by Valine? Write the triplet code for valine.

Q.16. Define term mutation. What could be the advantage of mutation causing sickle cell anemia.
Q.17. Write the nature, cause and symptoms of following Mendelian disorders in tabular form:

SCA, Haemophilia, Phenyketoneurea

Q.18. Mention the cause and symptoms of :

Down's Syndrome,          Klinefelter Syndrome,                 Turner syndrome