Classical Genetics - Tamil Nadu Board STD 12 BIO BOTANY Questions - Vidyadip

Question types

Classical Genetics question types

78 questions across 4 question groups — pick any mix to generate a BIO BOTANY paper with step-by-step answer keys.

78

Questions

4

Question groups

5

Question types

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

[ 2 Marks Questions ]

[ 3 Marks Questions ]

[ 5 Marks Questions ]

Sample Questions

Classical Genetics 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

Match the following:
Epistatic interaction Example
(A) Complementary genes (i) Seed capsule in xxxxx
(B) Supplementary genes (ii) Leaf color in rice plant
(C) Inhibitory genes (iii) Grain color in maize
(D) Duplicate genes (iv) Flower color in sweet peas

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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

The 1:2:1 ratio of co-dominance process Mendel’s __________

A
Law of dominance
✓
Law of recessiveness
C
Law of segregation
D
Law of independent assortment

Answer: B.

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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

Factor hypothesis was proposed by __________

A
Reginald Punnett
✓
W. Bateson
C
Gregor Mende
D
Carl Correns

Answer: B.

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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

Gametes are never hybrid’ is concluded by __________

A
Law of dominance
✓
Law of segregation
C
Law of independent environment
D
Law of lethality

Answer: B.

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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

Identify the allelic interaction.

A
Domination epistasis
✓
Co – dominance
C
Recessive epistasis
D
Duplicate genes

Answer: B.

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Q 6[ 2 Marks Questions ]2 Marks

Name the respective pattern of inheritance where $F_1$ phenotype
(a) resembles any one of the two parents
(b) is an intermediate between two parental traits.

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Q 7[ 2 Marks Questions ]2 Marks

Give the $F_2$ phenotypic ratio of
(a) Supplementary genes
(b) Complementary genes
(c) Dominant epistasis

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Q 8[ 2 Marks Questions ]2 Marks

In the chart given below, ‘AA’ are the genes located in a chromosome of Pisum sativum.

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Q 9[ 2 Marks Questions ]2 Marks

Mala is a genetic research student. She was given a plant to identify whether it is a homozygous or heterozygous for a particular trait. How will she proceed further?

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Q 10[ 2 Marks Questions ]2 Marks

A yellow colour flower plant indicated by YY is crossed with white color flower plant denoted by yy.
(a) following the Mendelian inheritance pattern, what would be the flower color is first filial generation?
(b) Which Mendelian principle is illustrated in this cross?
(c) Derive the cross and state the phenotypic ratio of yellow flowers to white flowers in $F_2$ generation?

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Q 11[ 3 Marks Questions ]3 Marks

Write a short note on Atavism.

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Q 12[ 3 Marks Questions ]3 Marks

Give an account on cytoplasmic male sterility.

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Q 13[ 3 Marks Questions ]3 Marks

Define co-dominance. How it is proved by using Gossypium species?

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Q 14[ 3 Marks Questions ]3 Marks

Define trihybrid cross. Mention its F2 phenotypic ratio.

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Q 15[ 3 Marks Questions ]3 Marks

How many types of gametes are produced by heterozygous dihybrid plant with a genotypeRrYy? Write them.

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Q 16[ 5 Marks Questions ]5 Marks

Describe incomplete dominance exhibited by Mirabilis jalapa.

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Q 17[ 5 Marks Questions ]5 Marks

How does the wrinkled gene make Mendel’s peas wrinkled? Find out the molecular explanation.

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Q 18[ 5 Marks Questions ]5 Marks

Explain Dihybrid cross in pea plant.

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