Heredity - Tamil Nadu Board STD 10 Science Questions - Vidyadip

Question types

Heredity question types

40 questions across 8 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

40

Questions

8

Question groups

5

Question types

Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.

Fill in the blank

True-False

[1 Mark Questions]

[2 Mark Questions]

[4 Mark Questions]

Match The Following.

[7 marks Questions]

Sample Questions

Heredity questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

The addition or deletion in the number of chromosomes present in a cell is called _______

A
Homogametic
B
Polymerase
✓
Ploidy
D
Nucleoside

Answer: C.

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Q 2Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

In human males all the chromosomes are paired perfectly except one. The unpaired chromosomes are:

A
large chromosome
B
small chromosome
✓
Y- chromosome
D
X- chromosome

Answer: C.

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Q 3Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

The number, size and shape of chromosomes in the cell nucleus of an organism ______

✓
Karyotype
B
Heterozygous
C
Autosome
D
Nucleotide

Answer: A.

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Q 4Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

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

✓
Tallness is the dominant trait
B
Shortness in the dominant trait
C
Tallness in the recessive trait
D
Height of pea plant is not governed by gene ‘T’ or ‘t’

Answer: A.

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Q 5Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

The thin long thread-like structures consisting of two identical strands ______.

A
Hybrid
✓
Chromosomes
C
Genes
D
DNA and RNA.

Answer: B.

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Q 6Fill in the blank1 Mark

The nucleotides in a helix are joined together by ______ bonds.

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Q 7Fill in the blank1 Mark

The constriction of the chromosome at any point is called ______.

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Q 8Fill in the blank1 Mark

The end of the chromosome is called ______.

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Q 9Fill in the blank1 Mark

_____ mutation is the changes occurring in the nucleotide sequence of a gene.

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Q 10Fill in the blank1 Mark

______ is the enzyme, which separates the double helix of DNA, above the replication fork.

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Q 11True-False1 Mark

Adenine always links with Guanine with three hydrogen bonds and cytosine always links with thymine with two hydrogen bonds.

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Q 12True-False1 Mark

The human female is called Homogametic. The human males are called heterogametic.

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Q 13True-False1 Mark

The mother is responsible for determining the sex of the child. The sperm produced by the father does not determine the sex of the child.

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Q 14True-False1 Mark

The chromosomes of body cells of an organism are haploid in condition and the single set of chromosomes in gametes are diploid in condition.

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Q 15True-False1 Mark

The character which expresses itself is called the dominant condition and that which is masked is called recessive condition.

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Q 16[1 Mark Questions]1 Mark

What are Nucleoside and Nucleotide?

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Q 17[1 Mark Questions]1 Mark

What are the components of chromosome?

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Q 18[1 Mark Questions]1 Mark

What does the dihybrid cross involve?

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Q 19[1 Mark Questions]1 Mark

Who proposed the double helical model of DNA?

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Q 20[1 Mark Questions]1 Mark

What is locus?

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Q 21[2 Mark Questions]2 Marks

How do chromosomes take part in the formation of the male and female child?

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Q 22[2 Mark Questions]2 Marks

What is sickle cell anaemia?

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Q 23[2 Mark Questions]2 Marks

Give reason for the appearance of new combination of characters in F2 progene.

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Q 24[2 Mark Questions]2 Marks

Explain the types of chromosome-based on the position of the centromere.

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Q 25[2 Mark Questions]2 Marks

What are chromonema and chromomeres?

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Q 26[4 Mark Questions]4 Marks

What is the difference between a gene mutation and a chromosomal mutation?

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Q 27[4 Mark Questions]4 Marks

What do you understand about DNA, gene and chromosome in short?

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Q 28Match The Following.4 Marks

1. Waldeyar	(a) Role of chromosome in heredity
2. James Watson and Crick	(b) Father of genetics
3. Hugo de Vries	(c) Down’s syndrome
4. Langdon Down	(d) Chromosomes
5. T.H Morgan	(e) Mutation
6. Gregor Johan Mendel	(f) Model of DNA

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Q 29Match The Following.4 Marks

1. Homozygous	(a) polynucleotide
2. Genes	(b) human male
3. DNA	(c) occurs in pairs and alike
4. Heterozygous	(d) segments of DNA
5. Heterogametic	(e) bind DNA to the origin of replication site
6. Autosome	(f) occurs in pairs and unlike
7. Helicase	(g) somatic characters

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Q 30[7 marks Questions]7 Marks

Explain in detail, the various steps of DNA replication.

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Q 31[7 marks Questions]7 Marks

Explain the Watson and Crick model of DNA.

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Q 32[7 marks Questions]7 Marks

Explain Mendel’s laws of heredity with the results of a dihybrid cross.

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Q 33[7 marks Questions]7 Marks

Explain the monohybrid cross, with a diagram and describe the interpretation of Mendel oh monohybrid cross.

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Q 34[7 marks Questions]7 Marks

Given an account of the Laws of Mendel.

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