CBSE Class 10 Biology Heredity Worksheet Set 04

Chapter-wise Worksheets for Class 10 Science: Chapter 08 Heredity

Review targeted academic worksheets with the CBSE Class 10 Biology Heredity Worksheet Set 04. Built according to official educational standards for the 2026-27 term, these downloadable Class 10 Science resources support effective daily practice and detailed self-evaluation for Chapter 08 Heredity.

Practice Class 10 Science Worksheets: Chapter 08 Heredity

View or download the dedicated CBSE Class 10 Biology Heredity Worksheet Set 04 resource below. Engaging with these practice papers under focused study conditions ensures continuous academic progress and mastery of the 2026-27 curriculum for Chapter 08 Heredity.

Objective Questions

Question : Which of the following statement is incorrect?
a. For every hormone there is a gene.
b. For every protein there is a gene.
c. For production of every enzyme there is a gene.
d. For every molecule of fat there is a gene
Answer : D

Question : 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
Answer : A

Question : Independent inheritance of two separate traits, shape and colour of seeds in Mendel’s cross on pea plants resulted in a observable ratio of:
a. 3 : 1
b. 9 : 3 : 3 : 1
c. 1 : 1
d. 9 : 4 : 2 : 1
Answer : B

Question : A Mendialian experiment consisted of breeding of tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers but almost half of it were short. This suggests that the genetic makeup of tall parent can be depicted as:
a. TTWW
b. TTww
c. TtWW
d. TtWw
Answer : C

Question : The number of sex chromosomes in zygote of human is_______.
a. 1
b. 2
c. 3
d. 4
Answer : B

Question : Which of the following is totally impossible outcome of Mendel’s Experiment?
a. 3 tall 1 short
b. 24 tall 8 short
c. 8 tall 0 short
d. 4 tall 1 medium height-
Answer : D

Question : Which section of DNA provides information for one protein?
a. Nucleus
b. Trait
c. chromosome
d. gene
Answer : D

Question : A character which is expressed in hybrid is ________.
A. Dominant
B. Recessive
C. Co-dominant
D. Epistatic
Answer : A

Question : Who proved the evidence of DNA as a genetic Material? 
a. Gregor Mendel
b. Frederick meisner
c. Weismann
d. Lamarck
Answer : B
Explanation: In 1869, Johann Friedrich Miesner, a young Swiss medical student, discovered an acidic substance that he isolated from pus cells obtained from bandages used to dress humans. He found it in the form of a mixture of compounds in the nucleus of the cell and named it “Nuclein”. The nature of Nuclein was unusual as it contained large amounts of both nitrogen and phosphorous and at that time these two elements were known to coexist only in certain types of fats.
Even though the discovery of Nuclein by Meischer took quite early but the discovery of DNA as genetic material took very long to be discovered and proven
 
Question : An example of homologous organs is
a. our arm and a dog’s fore-leg.
b. our teeth and an elephant’s tusks.
c. potato and runners of grass.
d. all of the above.
Answer : D
 
 
Question : A cross between hybrid and a parent is known as 
a. Back cross
b. Test cross
c. Monohybrid cross
d. Reciprocal cross
Answer : A 
Explanation: Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, in order to achieve offspring with a genetic identity which is closer to that of the parent. It is used in horticulture, animal breeding and in production of gene knockout organisms. 
 
Question : Which plant was chosen by Mendel to work upon? 
a. pea
b. Gram
c. rose
d. All of these
Answer :  A
Explanation: Mendel selected pisum sativum (a pea plant )of his ground to observe the characterstics of progeny produced.
 
Question : Match the following with correct response. 
(1) Edible part in kale           (A) Terminal bud
(2) Edible part in kohlrabi     (B) Swollen stem
(3) Edible part in Broccoli     (C) Leaves
(4) Edible part in Cabbage    (D) Immature green flowers
a. 1-B, 2-D, 3-A, 4-C
b. 1-C, 2-B, 3-D, 4-A
c. 1-D, 2-A, 3-C, 4-B
d. 1-A, 2-C, 3-B, 4-D
Answer :  B
Explanation:
A. Part of kale which is eaten is it's leaf.
B. Part of kohlrabi which is eaten is it's swollen stem.
C. Part of broccoli which is eaten is it's immature flowers.
D. Part of cabbage which is eaten is terminal overlapped buds.
 
Question : Which of these is an example of homologous organs? 
a. Potato and runners of grass
b. All of these
c. Our arm and a dog’s fore-leg.
d. Our teeth and an elephant’s tusks
Answer : B 
Explanation: All of these are the example of homologous organs. All of them corresponds in structure and in origin, but not necessarily in function.

Case Study Question

In some animals, the temperature at which fertilised eggs are kept determines whether the animal developing in the egg will be male or female. In other animals, such as snails, individuals can change sex, that is sex is not genetically determined. In human beings, sex of individuals is largely genetically determined. All chromosomes in human beings are not paired. We have 22 pairs and one pair of sex chromosomes which is odd and not always a perfect pair.

""CBSE-Class-10-Biology-Heredity-And-Evolution-Worksheet-Set-D

Question : Which pair of chromosomes are present in Male
(a) XX
(b) YY
(c) XY
(d) XXY
Answer : C

Question : How many pairs of chromosomes are called autosomes?
(a) 23
(b) 22
(c) 21
(d) 20
Answer : B

Question : Who is responsible for birth of male child?
(a) Father
(b) Mother
(c) Father only in first pregnancy.
(d) Mother only in first pregnancy
Answer : A

Question : Which pair of chromosomes are present in female?
(a) XX
(b) YY
(c) XY
(d) XXY
Answer : A

Question : Which of the following statement is true?
(a) Men have short sized X chromosome
(b) Men have one long sized Y chromosome
(c) Men have normal sized Y chromosome
(d) Men have one short sized Y chromosome
Answer : D

Very Short Answer Questions

Question : Define speciation.
Answer : Speciation means origin of new species from the existing one.

Question : How are characters or traits controlled?
Answer : Characters or traits of an organism are controlled by the genes /DNA.

Question : In a beetle population, the number of green beetles is more than blue and red beetles. Give a reason behind this situation.
Answer :  Variation/Natural selection.

Question :  Write the expanded form of DNA. 
Answer :  Deoxyribonucleic acid.

Question : What is genetic drift?
Answer :  The change in the frequency of certain genes in a population over generations.

Question : What is heredity?
Answer : Transmission of characters and traits from one generation to the next.

Question : How many pairs of chromosomes are present in human beings?
Answer :  23 pairs.

Question : Give any one character of gene. 
Answer : Gene has a fixed position on a chromosome.

Question : Name the term used for the traits that are exhibited externally.
Answer : Phenotype.

Question : An organism which is a worm, has very simple ‘eyes’, that are really eye spots which detect light. Name that organism.
Answer :  Planaria.

Question : Why is the progeny always tall when a tall pea plant is crossed with a short pea plant?
Answer : The trait which represents the tallness in a pea plant is dominant over the another trait, shortness (dwarf).

Question : Human have evolved from chimpanzee. Is it true? 
Answer :  No, the two species have evolved in separate ways from a common ancestor.

Question : Why is it that asexual reproduction produces exact copies but sometimes minor variations are also seen in next progeny?
Answer :  Since no biochemical reaction is reliable, therefore, in copying of DNA, it may cause slight difference which causes these variations.

Question : How can the chromosomes be identified?
Answer :  In human beings, the individual chromosomes are identified by their lengths, position of centromere and banding pattern on staining.

Question : No two individuals are absolutely alike in a population. Why?
Answer :  All individuals have different kind of DNA. So all individuals are not alike to each other.

Question : What is a gene?
Answer :  It is a functional piece of DNA that is responsible for expression of a trait in the organisms.

Question : What indication do we get by reappearance of dwarf plant in F2 generation?
Answer :  After obtaining progeny in F2 generation in a dihybrid cross, Mendel concluded that when two pairs of traits are combined in a hybrid, one pair of character segregates independently of the other pair of character.

Question : Mendel observed a contrasting trait in relation to position of flowers. Mention the trait.
Answer : Axial flower position (dominant), terminal flower position (recessive).

Question : Write the sex of the baby that inherits Y-chromosomes from the father.
Answer :   Male.

Question : What is the phenotypic ratio of a dihybrid cross in F2 generation?
Answer :  9 : 3 : 3 : 1.

Question : What is the effect of DNA copying which is not perfectly accurate on the reproduction process?
Answer :  It will result in less variations which may further lead to less adaptation to changing environment, thus, giving less chances of survival.

Question : What are the basic events in evolution?
Answer :  The changes in DNA during reproduction are the basic events in evolution.

 

Free study material for Science

Chapter 08 Heredity Printable Worksheets and Exercises for Class 10 Science

Mastering Chapter 08 Heredity with Printable Worksheets

Review targeted practice exercises for Class 10 Science Chapter 08 Heredity. Curated to match official CBSE guidelines, these printable problem sets support daily revision and improve overall test readiness.

Verified Solutions and NCERT Alignment

Designed around the official curriculum for Class 10 Science, these practice sheets guarantee standard compliance. Reviewing step-by-step solutions after completion sharpens your accuracy and clarifies complex sub-topics within Chapter 08 Heredity.

Additional Study Resources for Class 10 Science

Consistent engagement with these exercises builds familiarity with recurring exam themes. If specific areas within Chapter 08 Heredity cause trouble, utilize our dedicated NCERT solutions for Class 10 Science to clear up doubts immediately.

FAQs

Where can I download the 2026-27 CBSE printable worksheets for Class 10 Science Chapter 08 Heredity?

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Are these Chapter 08 Heredity Science worksheets based on the new competency-based education (CBE) model?

Yes, Class 10 Science worksheets for Chapter 08 Heredity focus on activity-based learning and also competency-style questions. This helps students to apply theoretical knowledge to practical scenarios.

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What is the benefit of solving chapter-wise worksheets for Science Class 10 Chapter 08 Heredity?

For Chapter 08 Heredity, regular practice with our worksheets will improve question-handling speed and help students understand all technical terms and diagrams.