1 of 50

Navodaya Vidyalaya Jogna(Pk25ng)

Heredity and

Evolution

Chapter 9

PRABHAT KU.NAGESH

P.G.T. BIOLOGY

JNV LOHARDAGA

2 of 50

3 of 50

Observe the variations

4 of 50

5 of 50

Heredity

6 of 50

Types of traits

7 of 50

8 of 50

Identify the

difference

9 of 50

Acquired trait

10 of 50

11 of 50

Low weight More weight

Acquired trait

12 of 50

Acquired traits are

Not inherited

13 of 50

Rules for the

Inheritance of traits

14 of 50

Gregor Mendel

15 of 50

Mendel work on inheritance of traits

16 of 50

Stem height

1

17 of 50

Seed shape

2

18 of 50

Flower colours

3

19 of 50

20 of 50

21 of 50

22 of 50

23 of 50

Dihybrid cross

24 of 50

25 of 50

Expression of traits

26 of 50

Sex determination

Non-Genetic and genetic

27 of 50

Non-Genetic

28 of 50

genetic

29 of 50

30 of 50

Evolution

Charles

Darwin

31 of 50

Speciation

32 of 50

Natural and artificial

33 of 50

1. Gene flow

Natural speciation

34 of 50

2. Geographical

isolation

35 of 50

3. Natural selection

36 of 50

4. Genetic drift

37 of 50

Artificial speciation

38 of 50

Evolution

and

classification

39 of 50

Tracing evolutionary

relationship

or

Four tools used to study

the evolutionary

relationship

40 of 50

  1. Homologous organs
  2. Analogous organs
  3. Study of fossils
  4. Determining DNA

sequences

​

41 of 50

Common ancestor

42 of 50

Analogous organs

43 of 50

Skin folds

elongated

Bat

Bird

44 of 50

2. Study of fossils

What are fossils?

Changes in life forms overtime

45 of 50

Formation of fossil

46 of 50

47 of 50

Dating(ageing) of fossils

1

48 of 50

49 of 50

Evolution by stages

50 of 50

Thank you

Made by:- PKN