Class 10 Science Chapter 9 MCQ

Class 10 Science Chapter 9 MCQ (Multiple Choice Questions) of Heredity and Evolution. All the objective questions are important for examination point of view. Practice science chapter 9 of class 10 here with these MCQs and score better in all exams.

All the MCQs are taken from NCERT Textbooks issued for new academic session 2021-2022.

Class 10 Science Chapter 9 MCQ Online Test for 2021-2022

Class: 10Science
Chapter: 9Heredity and Evolution
Contents:MCQ Online Tests with Answers and Explanation

Class 10 Science Chapter 9 MCQ with Answers for 2021-22

Class 10 Science Chapter 9 MCQ Online Test with solutions and answers. All the questions are taken from NCERT intext part as well as exercises section. Answers and explanation are also taken from NCERT Books for Class 10 Science only.


Read the following sentences carefully, and choose the incorrect one:

[A]. British scientist J.B.S. Haldane suggested in 1829 that life must have developed from the simple inorganic molecules.
[B]. It has been established by research that the earliest members of the human species came from Africa.
[C]. All human beings are a single species called “Homo sapiens”.
[D]. None of the above

The theory of evolution of species by natural selection was given by

[A]. Mendel
[B]. Darwin
[C]. Morgan
[D]. Lamarck

The number of pair (s) of sex chromosomes in the zygote of humans is

[A]. One
[B]. Two
[C]. Three
[D]. Four

Which of the following statement is or are correct?

[A]. The most accepted theory of evolution is the “Synthetic Theory of Evolution” in which the origin of species is based on the interaction of “genetic variation” and “natural selection”.
[B]. The complex body organs of animals such as “eyes” have been created in “stages” over many generations.
[C]. When farmer opted for the arrested flower development of wild cabbage plant, it leads to the production of another variety of cabbage called “Broccoli”.
[D]. All the above

Badal appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

[A]. Organic evolution is a sequence, about to sudden changes which take place in the primitive organisms under hundred years in which new species are produced.
[B]. Those organs which have the same basic structure but different functions are called homologous organs.
[C]. The remains for impressions of dead animals or plants that live in the remote past are known as fossils.
[D]. Those organs which have different basic structure for different basic design but have similar appearance and perform similar functions are called analogous organs.


In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. The changes in the non-reproductive body cells of an organisms cannot be inherited by its offspring.
[B]. A trait or characteristic of an organism which is “not inherited” but develops in response to the environment is called an acquired trait.
[C]. A trait of an organisms which is caused by a change is in its genes or DNA is called an inherited trait.
[D]. The acquired traits of organisms can be passed on to their future generations.

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

[A]. Copies of the same chromosome
[B]. Two different chromosomes
[C]. Sex chromosomes
[D]. Any chromosome

From the list given below, select the character which can be acquired but not inherited

[A]. Colour of eye
[B]. Colour of skin
[C]. Size of body
[D]. Nature of hair

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. The characteristics or traits of parents are transmitted to their progeny (offspring) through genes present on their chromosomes during the process of sexual reproduction.
[B]. The genes which dominate other genes are called dominant genes and the genes which get dominated are called receive genes.
[C]. The progeny inherits two genes for each trait from its parent but the traits shown by the progeny depends on which inherited gene is dominant of the two.
[D]. All the above

Consider the following statements and choose the incorrect one:

[A]. The characteristics or traits in animals including human beings, are also transmitted from the parents through genes by the process of sexual reproduction.
[B]. Mother is responsible for the sex of the baby boy or girl which is born.
[C]. The process by which the sex of a person is determined is called sex determination
[D]. The chromosomes which determine the sex of a person are called sex chromosomes.


Which of the following statement is or are correct?

[A]. Gametes constitute the link between one generation and the next, and pass on the paternal (or father’s) and maternal (or mother’s) characters or traits to the offspring.
[B]. The transmission of characters or traits from the parents to their offspring is called heredity.
[C]. The hereditary information is present in the sex cells or gametes of the parents.
[D]. All the above

Which of the following statements is not true with respect to variation?

[A]. All variations in a species have equal chance of survival
[B]. Change in genetic composition results in variation
[C]. Selection of variants by environmental factors forms the basis of evolutionary processes.
[D]. Variation is minimum in asexual reproduction

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

[A]. Carrot and potato
[B]. Carrot and tomato
[C]. Radish and carrot
[D]. Radish and potato

Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following

[A]. Round, yellow and Round, green
[B]. Round, yellow and Wrinkled, green
[C]. Round, green and Wrinkled, yellow
[D]. Round, yellow, and Wrinkled, yellow

Select the incorrect statement

[A]. Frequency of certain genes in a population change over several generations resulting in evolution
[B]. Reduction in weight of the organism due to starvation is genetically controlled
[C]. Low weight parents can have heavy weight progeny
[D]. Traits which are not inherited over generations do not cause evolution


In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are

[A]. Large chromosome, and small chromosome
[B]. Y-chromosome
[C]. Y-chromosome, and X-chromosome
[D]. Small chromosome, and X-chromosome

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

[A]. Round and yellow
[B]. Round and green
[C]. Wrinkled and green
[D]. Wrinkled and yellow

Two pink colored flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be

[A]. Double fertilization
[B]. Self-pollination
[C]. Cross fertilization
[D]. No fertilization

Exchange of genetic material takes place in

[A]. Vegetative reproduction
[B]. Asexual reproduction
[C]. Sexual reproduction
[D]. Budding

The sex of a child is determined by which of the following?

[A]. The length of the mother’s pregnancy
[B]. The length of time between ovulation and copulation
[C]. The presence of and X chromosome in an ovum
[D]. The presence of a Y chromosome in a sperm


Which of the following may be used to obtain an F2 generation?

[A]. Allowing flowers on a parent plant to be self-pollinated
[B]. Allowing flowers on an F1 plant to be self-pollinated
[C]. Cross-pollinating an F1 plant with a parent plant
[D]. Cross-pollinating two parent plants

In order to ensure that he had pure-breeding plants for his experiments, Mendel:

[A]. Cross-fertilised each variety with each other
[B]. Let each variety self fertilise for several generations
[C]. Removed the female parts of the plants
[D]. Removed the male parts of the plants.

Priya is writing some statements, choose the incorrect statement and help him:

[A]. The differences in the characters among the individuals of a species is called variation.
[B]. The free earlobes and attached earlobes are the two variations found in human population.
[C]. The significance of a variation shows up only if it continues to be inherited by the offspring for several generations.
[D]. The great disadvantage of variation to a species is that it increases the chances of its survival in a changing environment.

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Genes are actually units of heredity which transfer characteristics from parents to their offspring during reproduction.
[B]. Chromosome is a thread like structure in the nucleus of a cell formed of DNA which carries the genes.
[C]. A gene is a unit of DNA on a chromosome which governs the synthesis of one protein that controls a specific characteristic of an organism.
[D]. All the above

Which of the following statement is or are correct?

[A]. Gregor Mendel was the first scientist to make a systematic study of patterns of inheritance which involved the transfer of characteristics from parents to progeny.
[B]. The gene which can decide the appearance of an organism only in the presence of another identical gene is called a recessive gene.
[C]. The gene which decides the appearance of an organism even in the presence of an alternative gene is known as dominant gene.
[D]. All the above

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Which type of traits can be inherited as in Class 10 Science chapter 9?

Those Variations, which arise during the process of reproduction, can be inherited.

What is meant by heredity according to 10th Science chapter 9?

Transfer of traits from parents to offspring is called heredity.

How do we determine the age of fossil explained in 10th Science NCERT Chapter 9?

There are two components to determine the age. One is, if we dig into the earth and start finding fossils, it is reasonable to suppose that the fossils we find closer to the surface are more recent than the fossils we find in deeper layers. The second way of dating fossils is by detecting the ratios of different isotopes of the same element in the fossil material.

What are fossils as in Class 10 Science Chatper 9?

When a living being dies and the dead body gets caught in hot mud, for example, it will not decompose quickly, and the mud will eventually harden and retain the impression of the body parts of the living being. All such preserved traces of living organisms are called fossils.