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CBSE Notes 2011-2012 » Heredity and Evolution - Class 10 Biology MCQs (Free Practice Test)

Heredity and Evolution - Class 10 Biology MCQs (Free Practice Test)


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Question :

Select the incorrect statement:


Answer :

Frequency of certain genes in a population change over several generations resulting in evolutio
Reduction in weight of the organism due to starvation is genetically controlled
Low weight parents can have heavy weight progeny
Traits which are not inherited over generations do not cause evolution


Question :

Fingers in humans are an example of


Answer :

Adaptation
Specialisation
Variation
Inheritance


Question :

A Mendelian experiment consists in breeding tall pea plants
bearing violet flowers with short pea plants bearing white
flowers. The progeny all bore violet flowers, but almost
half of them are short. This suggests that the genetic makeup
of the tall parent can be depicted as - [NCERT]


Answer :

TTWW
TTww
TtWW
TtWw


Question :

To study the natural phenomenon of inheritance, Mendel
selected the pea plants. Which of the following properties
were suitable for their studies ? (i) Plants would easily self pollinate or cross pollinate
in nature.
(ii) Plants were easily grown in garden soil with a
considerably shorter generation time.
(iii) Pea plants do not require the true-breeding for
hybridisation experiments.
(iv) Many parts of the plant such as pod, seed, flower,
cotyledons showed distinct phenotypes..


Answer :

(i) ,(ii) and (iii).
(ii) and (iv).
(i) and (ii).
(ii), (iii) and (iv).


Question :

The theory of evolution of species by natural selection was
given by


Answer :

Mendel
Darwin
Morgan
Lamarck


Question :

Select the statements that describe characteristics of genes :
(i) Genes are specific sequence of bases in a DNA
molecule
(ii) A gene does not code for proteins
(iii) In individuals of a given species, a specific gene
is located on a particular chromosome
(iv) Each chromosome has only one gene


Answer :

(i) and (ii)
(i) and (iii)
(i) and (iv)
(ii) and (iv)


Question :

What is the difference between genetic drift and change
due to natural selection ?


Answer :

Genetic drift does not require the presence of variation.
Genetic drift never occurs in nature, natural selection does.
Genetic drift does not involve competition between members of a species.
There is no difference.


Question :

Which of the following is a recessive trait in garden pea
plant ?


Answer :

Wrinkled seeds
Round seeds
Oval seeds
Coloured seed coat


Question :

Heredity or inheritance of specific traits became clearer
due to


Answer :

Darwinism
Neo-Darwinism
Mendel's work on garden peas
Lamarck's theory


Question :

Two nucleotide sequences found in two different species
are almost exactly the same. This suggests that these species


Answer :

contain identical DNA
may have similar evolutionary histories
have the same number of mutations.
are evolving into the same species.