Momentum Academy
Subject: Biology
Name: _________
Maximum Marks: 20
Date:
Marks Obtained: ___
I.
Observe the diagram below and answer the questions given below:
B
A
(i)
Label A and B
[2]
A -………………………………………………………………………………………
B -………………………………………………………………………………………
(ii)
Which of the above parts become visible only during cell division?
[1]
………………………………………………………………………………………
II.
Define:
[2]
Variation- ………………………………………………………………………………………
………………………………………………………………………………………
Inheritance- ………………………………………………………………………………………
………………………………………………………………………………………
1
III.
2
IV.
Dogs have 78 chromosomes. What will be the number of chromosomes in the egg cell of a female dog?
[1]
………………………………………………………………………………………
All adult dogs in the above picture belong to the same species.
State 2 similarities between them.
[2]
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
State 2 differences between them. In the differences that you mention, state which difference would be
caused due to genetic differences and which one would be caused due to the environment. [3]
…………………………………………………………………………………………………………………
………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………….
V.
The figure below shows a family.
Mother
Father
Daughter
The father has genes for black hair, curly hair, attached ear lobes, light eyes and absence of freckles.
The mother has genes for red hair, straight hair, dark eyes, free ear lobes and freckles.
(a)
Which features has the daughter inherited from her parents?
3
[2]
………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………
(b)
The daughter has some similarity of features from her parents. Give reason for the same.
[1]
………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………
( c) Some features of the daughter are different from both her parents. Give reason for this
[1]
……………………………………………………………………………………………………………………
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