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

Assertion (A) : Inheritance from the previous generation provides subtle changes in body design for the next generation. Reason (R) : Greater diversity will be generated if asexual reproduction is involved.

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

2 / 15

Assertion (A) : A single copy of ‘T’ is enough to make the plant tall. Reason (R) : Tallness trait (T) in Mendel’s experiment is a dominant trait.

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

Why did Mendel carry out an experiment to study inheritance of two traits in garden-pea

To see the interaction and basis of inheritance between them.

To see the Difference between them.

Just to Observe them

none of these

5 / 15

What is the phenotypic ratio obtained in Mendels dihybrid cross

9:3:3:1

9:3:2:1

9:3:1:1

9:9:3:1

6 / 15

Laws of inheritance were proposed by

Isaac Newton

Mendel

Thomas Edison

None of these

7 / 15

A group of grass hoppers – some green and some brown-lived in grassland having dry bushes and dry grass. Name the phenomeneon

Natural Selection

Natural inheritance

law of dominance

law of independence

8 / 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

9 / 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

10 / 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

11 / 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

12 / 15

The two versions of a trait (character) which are brought in by the male and female gametes are located on:

Copies of the same chromosome

Two diferent chromosomes

Sex chromosomes

Any chromosome

13 / 15

Name the organ analogous to the wings of birds.

Forelimb of human

Wings of insect

Fore-leg of horse

None of these

14 / 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.

15 / 15

If a round, green-seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant, (rr YY), the seeds production in F1 generation are:

Round and yellow

Round and green

Wrinkled and green

Wrinkled and yellow

Your score is

0%

Science : Ch 09 – Heredity and Evolution

Archives

Categories