Science : Ch 09 – Heredity and Evolution

This test is designed based on NCERT Syllabus for Class 10 Topics : Heredity and Evolution

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

A zygote which has an X chromosome inherited from the father will develop into a

Boy

Girl

X chromosome does not determine the sex of a child

Either boy or girl

2 / 15

Assertion (A) : Acquired traits cannot be passed from one generation to next generation. Reason (R) : Inaccuracy during DNA copying of acquired trait is minimum.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true but (R) is not the correct explanation of the assertion

(A) is true but (R) is false

(A) is false but (R) is true

3 / 15

Assertion (A) : In human beings, sex of the individual is not genetically determined. Reason (R) : The genes inherited from our parents decide whether we will be boys or girls.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true but (R) is not the correct explanation of the assertion

(A) is true but (R) is false

(A) is false but (R) is true

4 / 15

What were his fndings with respect to inheritance of traits in F1 and F2 generation by Mendle?

Feature of only one parental type appear

None of these

5 / 15

A woman has only daughters which

Indicates that in every fusion, the sperm carrying the Y chromosome fertilized the ovum.

Indicates that in every fusion, the sperm carrying the X and Y chromosome fertilized the ovum.

Indicates that in every fusion, the sperm carrying the X chromosome fertilized the ovum.

Both 1 & 3

6 / 15

Who is the Father of Genetics ?

Thomas Edison

charles Darwin

Mendel

none of these

7 / 15

A zygote which has an Y chromosome inherited from the father will develop into a

Boy

Girl

Y chromosome does not determine the sex of a child

Either boy or girl

8 / 15

The maleness of a child is determined by:

The X chromosome in the zygote

The Y chromosome in the zygote

The cytoplasm of the germ cell which determines the sex

Sex is determined by chance

9 / 15

A trait in an organism is infuenced by:

Paternal DNA only

Maternal DNA only

Both maternal and paternal DNA

Neither paternal nor maternal DNA

10 / 15

Select the group which shares the maximum number of common characters

Two species of a genus

Two genera of a family

Two individuals of a species

Two genera of two families

11 / 15

Which of the subsiquent is not a direct conclusion that can be drawn from Mendels experiment?

Only one parental trait is expressed.

Two copies of each trait are inherited in sexually reproducing organism

For recessive trait to be expressed, both copies should be identical

Natural selection can alter frequency of an inherited trait.

12 / 15

If the fossil of an organism is found in the deeper layers of earth, then we can predict that:

The extinction of the organism occurred recently

The extinction of the organism occurred thousands of years ago

The fossil position in the layers of Earth is not related to its time of extinction.

The time of extinction cannot be determined.

13 / 15

In human males, all the chromosomes are match up perfectly except one. These unpaired chromosomes are:

Large chromosome

Small chromosome

Y chromosome

X chromosome

3 and 4

2 and 3

1 and 4

3

14 / 15

A zygote which has an X chromosome inherited from the father will develop into a:

Boy

Girl

X chromosome does not determine the sex of a child

Either boy or girl

15 / 15

Select the inappropriate statement:

The frequency of certain genes in a population change over several generations resulting in evolution.

The reduction in the weight of an organism due to starvation is genetically controlled.

Low weight parents can have heavy weight progeny.

Traits which are not inherited over generations do not cause evolution.

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Science : Ch 09 – Heredity and Evolution

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