Heredity and Evolution Class 10 Important Questions 2022

Heredity and Evolution Class 10 Important Questions 2022

Short Answer Type Questions 

1. The genotype of green stemmed tomato plants is denoted as GG and that of purple stemmed tomato plants as gg. When these two are crossed:

(i) What colour of stem would you expect in their F₁ progeny?

(ii) Give the percentage of purple-stemmed plants if F₁ plants are self pollinated.

(iii) In what ratio would you find the genotypes GG and Gg in the F₂ progeny? [CBSE Sample Paper]

2. Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?

3. What are analogous organs? How do they provide evidence in support of evolution?

4. (a) Give one term caption for the two pictures given here.

(b) Define the term and give its significance in evolution. [CBSE Sample Paper]

Long Answer Type Questions

1. Explain that it is a matter of chance whether a couple will give birth to a boy or a girl.

[CBSE Sample Paper]

3. Describe modern theory or Oparin hypothesis of origin of life.

4. Evolution occurs because of variations. Justify this statement giving some suitable examples.

5. Comment upon the statement that evolution should not be equated with progress.

Multiple Choice Questions

(i)The term genetics was given by:

(a) Mendel

(b) Bateson

(c) Darwin

(d) Sutton and Boveri

(ii) Who amongst the following is known as "Father of Genetics?

(a) Mendel

(b) Bateson

(c) Darwin

(d) None of them

(iii) The genes or factors that express themselves in heterozygous condition are called:

(a) alleles 

(b) dominant

(c) recessive

(d)phenotype

(iv) The fountain head of evolution are the :

(a) mutations

(b) natural selection

(c) genetic drift 

(d) all of these

(v) During the origin of life, the source of energy for the molecular interaction was:

(a) cosmic radiations 

(b) UV rays

(c) gamma rays

(d) all of these