Heredity Class 10 Science MCQ Quiz – Test Your Knowledge

Are you preparing for your CBSE Class 10 Science exam? Boost your understanding of Heredity with this engaging MCQ quiz. This chapter covers inheritance of traits, Mendel’s laws, sex determination, and variations—key topics for board exams.

About the Quiz

Chapter Name: Heredity
Subject: Science (Biology)
Book: NCERT Class 10 Science
Question Type: Multiple Choice Questions (MCQs)
Leaderboard: Yes (Compete with Others!)

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✔ Helps in quick revision for board exams
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Chapter 8 - Heredity

1 / 15

Which of the following is heterozygous?

ttrr

TTRR

2 / 15

A recessive homozygote is crossed with a heterozygote of the same gene. What will be the phenotype of the F1 generation?

25 % dominant, 50 % heterozygous, 25 % recessive

75 % dominant, 25 % recessive

All dominant

50 % dominant, 50 % recessive

3 / 15

Assertion: The probability of survival of an organism produced through sexual reproduction is more than that of an organism produced through asexual mode.

Reason: Variations provide advantages to individuals for survival.

A is false but R is true.

Both A and R are true, and R is the correct explanation of A.

Both A and R are true, and R is not the correct explanation of A.

A is true but R is false.

4 / 15

Assertion (A): Height in pea plants is controlled by the efficiency of enzymes and is thus genetically controlled.

Reason (R): Cellular DNA is the information source for making proteins in the cell.

Both A and R are true and R is the correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is false but R is true

A is true but R is false

5 / 15

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 a new combination of characters. Choose the new combination from the following.

Round, yellow

Round, green

Wrinkled, yellow

Wrinkled, green

I and II

II and III

I and III

I and IV

6 / 15

Which statement about the genotypes of organisms is correct?

The dominant phenotype must be heterozygous

Recessive phenotypes must be homozygous

Dominant alleles are only found in homozygotes

One recessive allele always causes a recessive phenotype

7 / 15

A heterozygous red-eyed female Drosophila mated with a white-eyed male would produce _____.

Half red and half white-eyed females as well as males in the F1

White-eyed females and red-eyed males in the F1

Red-eyed females and white-eyed males in the F1

Half red and half white-eyed females and all white-eyed males in the F1

8 / 15

If a tall pea plant is crossed with a pure dwarf pea plant then, what percentage of F1 and F2 generation respectively will be tall?

75%, 100%

25%, 25%

50%, 50%

100%, 75%

9 / 15

9 : 3 : 3 : 1 ratio is due to _____.

Independent assortment

Segregation

Crossing over

Recessiveness

10 / 15

In cattle, having horns is a recessive trait (h) to not having horns (H). When cattle with horns are crossed with cattle that do not have horns, the number of offspring having horns was equal to those not having horns. Which of the following is MOST LIKELY to be true?

Both parents are homozygous dominant.

One parent is homozygous dominant.

Both parents are heterozygous.

One parent is heterozygous.

11 / 15

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

Round and green

Wrinkled and green

Round and yellow

Wrinkled and yellow

12 / 15

A homozygous dominant guinea pig with black fur is crossed with a homozygous guinea pig with white fur. The F1 generation is crossed with itself.

What percentage of F2 generation is expected to show a white fur coat?

100 %

50 %

75 %

25 %

13 / 15

Assertion (A): Offsprings produced by sexual reproduction show variation.

Reason (R): Each offspring produced by sexual reproduction inherits all the genes from each parent.

Both A and R are true and R is not the correct explanation of A

A is false but R is true

Both A and R are true and R is the correct explanation of A

A is true but R is false

14 / 15

In an asexually reproducing species if trait X exists in 5% of a population and trait Y exists in 70% of the same population, which of the two traits is likely to have arisen earlier?

Trait X

Insufficient information

Trait Y

15 / 15

Which of the following statements is incorrect?

For the production of every enzyme there is a gene.

For every molecule of fat there is a gene.

For every hormone there is a gene.

For every protein there is a gene.

Your score is

The average score is 54%

Leaderboard – Top Scorers

Check out the highest scorers below!

Pos.	Name	Score	Duration	Points
1	Praniii...	100 %	1 minutes 4 seconds	15
2	Subhankar	100 %	1 minutes 7 seconds	15
3	Ddededede	100 %	1 minutes 56 seconds	15
4	Varun	100 %	1 minutes 58 seconds	15
5	varun	100 %	2 minutes 51 seconds	15
6	varun	100 %	5 minutes 5 seconds	15
7	Alll	93 %	1 minutes	14
8	Eunice	93 %	1 minutes 7 seconds	14
9	Harsh jain	93 %	1 minutes 36 seconds	14
10	Sarthak	93 %	2 minutes 20 seconds	14
11	Vaishnavi	93 %	3 minutes 11 seconds	14
12	Harsh jain	93 %	4 minutes 15 seconds	14
13	M	93 %	5 minutes 11 seconds	14
14	Akshita	93 %	6 minutes 28 seconds	14
15	Jaiha	93 %	8 minutes 43 seconds	14
16	Subhankar	87 %	55 seconds	13
17	Manuela	87 %	1 minutes 18 seconds	13
18	///	87 %	2 minutes 56 seconds	13
19	Mishwa	87 %	3 minutes 3 seconds	13
20	Pranii	87 %	3 minutes 31 seconds	13
21	Varun	87 %	3 minutes 35 seconds	13
22	varun	87 %	4 minutes	13
23	Anushka Selot	87 %	4 minutes 8 seconds	13
24	Rc	87 %	4 minutes 39 seconds	13
25	S	87 %	5 minutes 3 seconds	13
26	T	87 %	8 minutes 59 seconds	13
27	Ruhi	87 %	9 minutes 2 seconds	13
28	Manpreet	87 %	9 minutes 21 seconds	13
29	Aka	80 %	1 minutes 31 seconds	12
30	ANJALI PANDEY	80 %	1 minutes 34 seconds	12
31	Nishant	80 %	1 minutes 53 seconds	12
32	darsh	80 %	1 minutes 56 seconds	12
33	Ale	80 %	1 minutes 58 seconds	12
34	,	80 %	3 minutes 42 seconds	12
35	Aa	80 %	4 minutes 9 seconds	12
36	mihi	80 %	7 minutes 25 seconds	12
37	Kashish	80 %	7 minutes 45 seconds	12
38	just	80 %	8 minutes 25 seconds	12
39	Ayushman	80 %	9 minutes 34 seconds	12
40	rr	80 %	9 minutes 40 seconds	12
41	mendel	80 %	10 minutes 15 seconds	12
42	Partigya	80 %	12 minutes 49 seconds	12
43	Sesd	80 %	15 minutes 42 seconds	12
44	Shakti	73 %	2 minutes 13 seconds	11
45	Jhsh	73 %	2 minutes 37 seconds	11
46	Priya	73 %	2 minutes 45 seconds	11
47	Harshita	73 %	3 minutes 42 seconds	11
48	Anuj	73 %	4 minutes 18 seconds	11
49	Welvet	73 %	5 minutes 15 seconds	11
50	R	73 %	5 minutes 21 seconds	11
51	Ananya	73 %	5 minutes 49 seconds	11
52	Shrushti	73 %	6 minutes 38 seconds	11
53	Ws	73 %	8 minutes 12 seconds	11
54	gdsgds	73 %	8 minutes 37 seconds	11
55	Bhumika Singh	73 %	9 minutes 1 seconds	11
56	Priyanshu	73 %	9 minutes 2 seconds	11
57	Harmeet	73 %	12 minutes 6 seconds	11
58	Jaiha	73 %	13 minutes 6 seconds	11
59	Fgh	67 %	59 seconds	10
60	Akarsh	67 %	1 minutes 22 seconds	10
61	Subhankar	67 %	1 minutes 26 seconds	10
62	Manuela	67 %	2 minutes 30 seconds	10
63	Yudtud	67 %	4 minutes 3 seconds	10
64	Punya	67 %	4 minutes 9 seconds	10
65	ayesha	67 %	4 minutes 42 seconds	10
66	Shakti	67 %	4 minutes 58 seconds	10
67	=	67 %	4 minutes 59 seconds	10
68	Ullah	67 %	5 minutes 1 seconds	10
69	Gouri	67 %	6 minutes 24 seconds	10
70	kk	67 %	6 minutes 46 seconds	10
71	Ina	67 %	6 minutes 49 seconds	10
72	Lana	67 %	6 minutes 51 seconds	10
73	Harshul	67 %	6 minutes 59 seconds	10
74	Rishith	67 %	7 minutes 2 seconds	10
75	hi	67 %	8 minutes 35 seconds	10
76	Shivendra Singh Sengar	67 %	9 minutes 25 seconds	10
77	Eren	67 %	10 minutes 54 seconds	10
78	A	67 %	11 minutes 12 seconds	10
79	Isha	67 %	13 minutes 4 seconds	10
80	1234	67 %	15 minutes 20 seconds	10
81	Anushka	67 %	24 minutes 48 seconds	10
82	W	67 %	31 minutes 47 seconds	10
83	Gu	60 %	1 minutes 10 seconds	9
84	Subhankar	60 %	2 minutes 19 seconds	9
85	Akarsh	60 %	2 minutes 49 seconds	9
86	g	60 %	3 minutes 39 seconds	9
87	**	60 %	5 minutes 7 seconds	9
88	Narumugai yaline	60 %	5 minutes 29 seconds	9
89	AK	60 %	5 minutes 35 seconds	9
90	Sneha	60 %	6 minutes 42 seconds	9
91	Kanak	60 %	7 minutes 2 seconds	9
92	Pranii...♥️	60 %	7 minutes 27 seconds	9
93	Purab	60 %	9 minutes 49 seconds	9
94	Puja	60 %	11 minutes 43 seconds	9
95	Vhhv	60 %	19 minutes 43 seconds	9
96	Naam chle bhai ka	53 %	42 seconds	8
97	Vj	53 %	58 seconds	8
98	Gu	53 %	1 minutes 3 seconds	8
99	Akarsh	53 %	1 minutes 22 seconds	8
100	Akarsh	53 %	1 minutes 29 seconds	8
101	Vani	53 %	1 minutes 39 seconds	8
102	Anjali Pandey	53 %	1 minutes 40 seconds	8
103	Anjali Pandey	53 %	1 minutes 48 seconds	8
104	Shruti arya	53 %	1 minutes 56 seconds	8
105	Jashanpreet Kaur	53 %	2 minutes 33 seconds	8
106	Kiwi	53 %	2 minutes 43 seconds	8
107	Shreya	53 %	2 minutes 56 seconds	8
108	Jeena	53 %	3 minutes 17 seconds	8
109	ch. navya	53 %	3 minutes 38 seconds	8
110	Alexa	53 %	3 minutes 39 seconds	8
111	darsh	53 %	3 minutes 46 seconds	8
112	Nishant	53 %	4 minutes 1 seconds	8
113	Ameena	53 %	4 minutes 3 seconds	8
114	Ravi	53 %	4 minutes 21 seconds	8
115	P	53 %	4 minutes 41 seconds	8
116	Sunil singh	53 %	5 minutes 6 seconds	8
117	Manuela	53 %	5 minutes 9 seconds	8
118	sun	53 %	6 minutes 25 seconds	8
119	Aakriti	53 %	6 minutes 35 seconds	8
120	AD	53 %	7 minutes 46 seconds	8
121	Maya	53 %	9 minutes 8 seconds	8
122	P	53 %	9 minutes 22 seconds	8
123	Ishita	53 %	10 minutes 31 seconds	8
124	Sakshi	53 %	11 minutes 9 seconds	8
125	Gg	53 %	16 minutes 3 seconds	8
126	Sayeda atefa	47 %	1 minutes 30 seconds	7
127	Anand Yadav	47 %	2 minutes 13 seconds	7
128	fiza	47 %	2 minutes 50 seconds	7
129	Raja	47 %	2 minutes 53 seconds	7
130	Gaurav Singh	47 %	2 minutes 53 seconds	7
131	Subhankar	47 %	4 minutes 2 seconds	7
132	Mohammed Hazin Rahess	47 %	5 minutes 5 seconds	7
133	Piyush	47 %	5 minutes 7 seconds	7
134	Sana	47 %	5 minutes 9 seconds	7
135	Hk	47 %	5 minutes 15 seconds	7
136	paji	47 %	5 minutes 20 seconds	7
137	Shubh	47 %	5 minutes 37 seconds	7
138	Jeevitha	47 %	6 minutes 36 seconds	7
139	Jin	47 %	7 minutes	7
140	Shanaya	47 %	7 minutes 48 seconds	7
141	Fardee	47 %	7 minutes 48 seconds	7
142	Khizra	47 %	8 minutes 1 seconds	7
143	Ashreen	47 %	8 minutes 4 seconds	7
144	Alka gupta	47 %	8 minutes 20 seconds	7
145	Akhil yadav	47 %	8 minutes 49 seconds	7
146	Prani..	47 %	9 minutes 2 seconds	7
147	Radhika sharma	47 %	11 minutes 38 seconds	7
148	Kamala Kanta Barik	47 %	16 minutes 5 seconds	7
149	Uu	40 %	28 seconds	6
150	Priya kumari	40 %	1 minutes 44 seconds	6
151	Yashwanth.R	40 %	3 minutes 8 seconds	6
152	M	40 %	3 minutes 30 seconds	6
153	Alexq	40 %	4 minutes 27 seconds	6
154	Parth wadhwani	40 %	4 minutes 47 seconds	6
155	Priya	40 %	4 minutes 54 seconds	6
156	Iqra Nafees	40 %	5 minutes 1 seconds	6
157	Meenu	40 %	5 minutes 3 seconds	6
158	Gaurav Singh	40 %	5 minutes 35 seconds	6
159	Shruti arya	40 %	5 minutes 47 seconds	6
160	adib	40 %	7 minutes 28 seconds	6
161	Sonam	40 %	7 minutes 36 seconds	6
162	Madhu	40 %	8 minutes 1 seconds	6
163	Ravi	40 %	8 minutes 15 seconds	6
164	Aditya	33 %	1 minutes 16 seconds	5
165	Shivam	33 %	2 minutes 35 seconds	5
166	Anjali Pandey	33 %	2 minutes 39 seconds	5
167	Purvanshi	33 %	2 minutes 45 seconds	5
168	Anmol	33 %	3 minutes 13 seconds	5
169	Shashank	33 %	3 minutes 49 seconds	5
170	Manish Kumar	33 %	4 minutes 10 seconds	5
171	Buddy	33 %	5 minutes 10 seconds	5
172	Harshita	33 %	5 minutes 12 seconds	5
173	Atul Raj	33 %	6 minutes 6 seconds	5
174	Xyz	33 %	6 minutes 10 seconds	5
175	H	33 %	6 minutes 22 seconds	5
176	Ishii	33 %	7 minutes 36 seconds	5
177	Laya	33 %	7 minutes 52 seconds	5
178	Nishant	33 %	8 minutes 14 seconds	5
179	Dhwaj jain	33 %	13 minutes 20 seconds	5
180	Hiv	33 %	17 minutes	5
181	Rock it 🤛🏻	27 %	29 seconds	4
182	Squid game	27 %	39 seconds	4
183	Arti	27 %	1 minutes 11 seconds	4
184	Ankush	27 %	1 minutes 13 seconds	4
185	Gjv	27 %	2 minutes 11 seconds	4
186	Rishi	27 %	2 minutes 12 seconds	4
187	Jotkaur	27 %	2 minutes 21 seconds	4
188	,ullha	27 %	3 minutes 3 seconds	4
189	Neeraj	27 %	3 minutes 30 seconds	4
190	Arpityadav	27 %	3 minutes 46 seconds	4
191	Naresh kumar	27 %	4 minutes 19 seconds	4
192	Bithika	27 %	12 minutes 36 seconds	4
193	WAAMUUU	20 %	1 minutes 14 seconds	3
194	Hh	20 %	1 minutes 41 seconds	3
195	Om Yadav	20 %	2 minutes 50 seconds	3
196	Sarvesh tembhare	20 %	2 minutes 58 seconds	3
197	Harsha	20 %	3 minutes 51 seconds	3
198	Riya 🥰 patel	20 %	5 minutes 1 seconds	3
199	Tau	20 %	5 minutes 26 seconds	3
200	dolly	20 %	6 minutes 14 seconds	3

Key Topics Covered in the Quiz

✔ Mendel’s Laws of Inheritance
✔ Monohybrid and Dihybrid Cross
✔ Dominant and Recessive Traits
✔ Sex Determination in Humans
✔ Genotypic and Phenotypic Ratios
✔ Variation and Evolution

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