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SAI International School
Subject- Biology
Chapter- Heredity And Evolution
Subtopic- Evolution, Natural selection, Genetic Drift, Acquired and
inherited traits
Module-25
Home Assignment- II (Worksheet)

Which scientist is regarded as the Father of Genetics?
1. a. Mendel
b. Darwin
c. Morgan
d. Lamarck
2. Which of the following statement is incorrect?
a. For every hormone there is a gene
b. For every protein there is a gene
c. For production of every enzyme there is a gene
a. For every molecule of fat there is a gene
3. Answer true or false
a) Reduction in weight of the organism due to starvation is genetically controlled.
b) New species may be formed if DNA undergoes significant changes germ
cells or chromosome number changes in the gametes.
4. DIRECTION : The following question consist of two statements - Assertion (A)
and Reason (R). Answer these questions selecting the appropriate option given
below:
(a) Both A and R are true and R is the correct
explanation of A.
(b) Both A and R are true but R is not the correct
explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both Assertion and Reason are false.
Assertion : Traits like eye colour or height are inherited traits.
Reason : Inherited traits are not transferred from parents to young ones.
5. Assertion : Mendel chose a number of varieties of garden pea as plant
material for his experiments.
Reason : Garden pea has well defined characters and was bisexual.
6. a) What are the advantages of variation during reproduction?
b) Why is variation beneficial to the species but not necessary for the individual?
7. a) Show the inheritance of two characters over two generations by making a cross
between round and yellow seeded plant (RRYY) with wrinkled and green seeded
plant(rryy).
b) Name the traits of the progeny (F 1) formed in the following crosses.

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