CBSE Class 10 Biology Heredity Worksheet Set 04

Here is the CBSE Class 10 Biology Heredity Worksheet Set 04 for your practice. Download printable Class 10 Science worksheets covering Chapter 8 Heredity for the 2026-27 academic session. Created by experienced educators, these sheets follow official testing patterns from NCERT, CBSE, and KVS to help students succeed.

Practice Worksheet: Class 10 Science Chapter 8 Heredity

Use this Science practice paper to evaluate your Chapter 8 Heredity skills. Built for Class 10 students, it offers essential questions and clear answers so you can practice daily and perform better in school tests and final examinations.

Class 10 Science Chapter 8 Heredity Practice Sheet

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

Science Class 10 Curriculum Worksheets: Chapter 8 Heredity

Daily Practice Questions for Class 10 Science

Prepare effectively for your upcoming evaluations by utilizing the curated practice tasks for Chapter 8 Heredity featured above. Built by expert educators to reflect the current 2026 CBSE guidelines for Class 10, these tools support steady academic growth. Regular practice is strongly recommended for Class 10 students seeking lasting proficiency in Science.

Chapter 8 Heredity Solutions & NCERT Alignment

These exercises draw directly from the authorized NCERT book for Class 10 Science to maintain academic accuracy. Evaluating your finished work against our expert solutions helps you master the formal answer-writing standards expected in CBSE exams. Explore the accompanying MCQ sets for Science to ensure full preparation across all chapter concepts.

Effective Revision Strategies for School Exams

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FAQs

Where can I download the 2026-27 CBSE printable worksheets for Class 10 Science Chapter 8 Heredity?

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Are these Chapter 8 Heredity Science worksheets based on the new competency-based education (CBE) model?

Yes, Class 10 Science worksheets for Chapter 8 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 8 Heredity?

For Chapter 8 Heredity, regular practice with our worksheets will improve question-handling speed and help students understand all technical terms and diagrams.