TN Online TestSamacheer Kalvi practice

Genetics Additional One Mark Online Test (10th Standard Science)

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The scientist regarded as the father of genetics is

A.Charles Darwin B.Gregor Johann Mendel C.Hugo de Vries D.Thomas Hunt Morgan

How many pairs of contrasting traits did Mendel choose for his experiments?

A.Five B.Six C.Seven D.Eight

The process of acquiring characters or traits from parents is called

A.Variation B.Heredity C.Mutation D.Evolution

The monohybrid phenotypic ratio obtained in the F2 generation is

A.3 : 1 B.1 : 2 : 1 C.9 : 3 : 3 : 1 D.1 : 1

Chromosomes bearing an elongated knob-like appendage are said to carry a

A.Centromere B.Telomere C.Satellite D.Chromomere

The terminal end of a chromosome is called the

A.Centromere B.Telomere C.Satellite D.Secondary constriction

A chromosome with the centromere at one end, so that it appears rod shaped, is

A.Metacentric B.Sub-metacentric C.Acrocentric D.Telocentric

Each nucleotide of DNA consists of a phosphate group, a nitrogenous base and

A.a deoxyribose sugar B.a ribose sugar C.an amino acid D.a fatty acid

In the DNA molecule base pairing always occurs between

A.two purines B.two pyrimidines C.a purine and a pyrimidine D.a sugar and a phosphate

Q10

The double helix model of DNA was proposed by

A.Mendel and Morgan B.Watson and Crick C.Darwin and Wallace D.Hugo de Vries and Correns

Q11

The enzyme that unwinds the two strands of DNA during replication is

A.Helicase B.DNA ligase C.RNA primase D.DNA polymerase

Q12

New nucleotides are added to form the complementary strand of DNA with the help of

A.DNA ligase B.Helicase C.DNA polymerase D.Amylase

Q13

The sex of a child is determined by

A.the ovum produced by the mother B.the sperm produced by the father C.both parents equally D.the number of autosomes

Q14

An inheritable change in the genetic material of an organism is called

A.Heredity B.Variation C.Mutation D.Karyotype

Q15

The number and appearance of the complete set of chromosomes of a cell is known as its

A.Genotype B.Phenotype C.Karyotype D.Allele

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About this Genetics test

This free online practice test covers Genetics from the 10th Standard Science (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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