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 2022-2023.

Class 10 Science Chapter 9 MCQ Online Test for 2022-2023

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

Class 10 Science Chapter 9 MCQ with Answers for 2022-23

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.

Q1

Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that

[A]. Reptiles have evolved from birds
[B]. There is no evolutionary connection between reptiles and birds
[C]. Feathers are homologous structures in both the organisms
[D]. Birds have evolved from reptiles
Q2

Consider the following statements and choose the incorrect one:

[A]. The process by which new species develop from the existing species is known as specification.
[B]. A species is a population of organisms consisting of similar individuals which can breed together and produce fertile offspring.
[C]. Geographical isolation is the major factor in the specification of sexually reproduce reproducing animals because it interrupts the flow of genes between their isolated population through the gametes.
[D]. None of the above
Q3

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

[A]. Mendel
[B]. Darwin
[C]. Morgan
[D]. Lamarck
Q4

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

[A]. One
[B]. Two
[C]. Three
[D]. Four
Q5

In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is

[A]. 1 : 3
[B]. 3 : 1
[C]. 1 : 1
[D]. 2 : 1
Q6

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.
Q7

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
Q8

A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggested that the genetic make-up (or genotype) of the tall parent can be depicted as:

[A]. TTWW
[B]. TTww
[C]. TtWW
[D]. TtWw
Q9

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
Q10

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
Q11

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
Q12

Select the correct statement

[A]. Tendril of a pea plant and phylloclade of Opuntia are homologous
[B]. Tendril of a pea plant and phylloclade of Opuntia are analogous
[C]. Wings of birds and limbs of lizards are analogous
[D]. Wings of birds and wings of bat are homologous
Q13

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
Q14

New species may be formed if:

[A]. DNA undergoes significant changes in germ cell, and Chromosome number changes in the gamete
[B]. DNA undergoes significant changes in germ cells and There is no change in the genetic material.
[C]. Chromosome number changes in the gamete, and there is no change in the genetic material, and mating does not take place
[D]. DNA undergoes significant changes in germ cells, and chromosome number changes in the gamete, and there is no change in the genetic material
Q15

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
Q16

Zygote which has an X-chromosome inherited from the father will develop into a

[A]. Boy
[B]. Girl
[C]. X- chromosome does not determine the sex of a child
[D]. Either boy or girl
Q17

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
Q18

A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because

[A]. Tallness is the dominant trait
[B]. Shortness is the dominant trait
[C]. Tallness is the recessive trait
[D]. Height of pea plant is not governed by gene ‘T’ or ‘t’
Q19

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
Q20

Exchange of genetic material takes place in

[A]. Vegetative reproduction
[B]. Asexual reproduction
[C]. Sexual reproduction
[D]. Budding
Q21

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
Q22

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.
Q23

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.
Q24

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
Q25

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.