Heredity and variability

1.

HEREDITY AND
VARIABILITY

2.

Lesson objectives
To investigate hereditary and non-
hereditary traits in human.
To give examples for discrete and
continuous variability

3.

WHY DO WE LOOK SIMILAR
TO OUR RELATIVIES AND
LOOK DIFFERENT TO
OTHERS?

4.

TRAITS
TRAITS ARE CHARACTERISTICS THAT
MAKE UP THE ORGANISM
EXAMPLES: EYE COLOUR, HAIR
COLOUR, BLOOD TYPE, EAR LOBES,
NOSE SHAPE

5.

THERE ARE TWO TYPES OF
TRAITS
INHERITED (НАСЛЕДСТВЕННЫЙ)
ACQUIRED (ПРЕОБРЕТЕННЫЙ)

6.

INHERITED TRAITS
INHERITED TRAITS ARE THE TRAITS THAT
CAN PASS FROM PARENTS TO OFFSPRING
Ex: brown eyes, free ear lobes, stripes on a tiger,
long neck in giraffe, flower scent.

7.

AQUIRED TRAITS
THE TRAITS THAT CAN NOT BE INHERITED AND ARE GOT
THROUGHOUT THE LIFE ARE CALLED AQUIRED TRAITS.
EXAMPLES: KNOWLEDGE, SKILLS, IDEAS, MEMORIES.

8.

Variation
Variation is any difference
between organisms of the same
species.

9.

Variations of traits within the
population

10.

Skin color variation

11.

Types of variations
Continuous (qualitative)
2. Discontinuous (quantitative)
1.

12.

Continuous (qualitative) variation vs.
discontinuous (quantitative) variation

13.

Let’s do activity on p.109

14.

Homework
Read p. 108-109
Answer to literacy questions on p 109
New words