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) : New combination of traits are observed in F2 offspring when tall plants with round seeds are crossed with short plants with wrinkled seeds. Reason (R) : Tallness and round seed are both dominant traits.

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

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

5 / 15

The major function of cellular DNA is

to store information and pass it to ofspring.

to store information and pass it to parents.

to store information and not pass it to ofspring.

none of these

6 / 15

Name the plant Mendel used of F1 & F2 generation cross of tall and short plant experiment.

Garden pea

Tomato

Brinjal

All vegetables

7 / 15

Select correct option about variation?

The differences in characteristics between individuals of the same species is called variation.

Variations arise in organisms during the process of copying the DNA due to which the DNA copies will be similar but not identical to the original

1

2

Both 1 & 2

None of these

8 / 15

Exchange of genetic material takes place in:

Vegetative reproduction

Asexual reproduction

Sexual reproduction

Budding

9 / 15

A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the exact homologous structures?

Carrot and potato

Carrot and tomato

Radish and carrot

Radish and potato

10 / 15

Two pink coloured fowers on crossing resulted in 1 red, 2 pink and 1 white fower progeny. The nature of the cross will be:

Double fertilization

Self pollination

Cross fertilization

No fertilization

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

Choose the statements that describe the characteristics of genes:

Genes are specifc sequence of bases in a DNA molecule

A gene does not code for proteins.

In individuals of a given species, a specifc gene is located on a particular chromosome.

Each chromosome has only one gene

1

1 and 3

3 and 4

3

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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