Science : Ch 09 – Heredity and Evolution

This test is designed based on NCERT Syllabus for Class 10 Topics : Heredity and Evolution

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

Mendel crossed the round and green seeded pea plants with the wrinkled and yellow seeded pea plants. Give the phenotypic ratio of F2 generation.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 9 : 3 : 2: 1.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 8 : 3 : 3 : 1.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 9 : 3 : 3 : 1.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 4: 3 : 3 : 1.

2 / 15

What were his fndings with respect to inheritance of traits in F1 and F2 generation by Mendle?

Feature of only one parental type appear

None of these

3 / 15

Laws of inheritance were proposed by

Isaac Newton

Mendel

Thomas Edison

None of these

4 / 15

The first person to give scientific explanation for the mechanism of transmission of characters from parents to the offsprings.

Charles Darwin

Mendel

Thomas Edison

none of these

5 / 15

The Phenomeneon of Natural Selection was done by

Charles Darwin

Mendel

Thomas Edison

None of these

6 / 15

Which of the following statement is inappropriate?

For every hormone there is a gene.

For every protein there is a gene.

For production of every enzyme there is a gene.

For every molecule of fat there is a gene.

7 / 15

The maleness of a child is determined by:

The X chromosome in the zygote

The Y chromosome in the zygote

The cytoplasm of the germ cell which determines the sex

Sex is determined by chance

8 / 15

From the list given below, select the character which can be acquired but not inherited:

Colour of eyes

Colour of skin

Size of body

Nature of hair

9 / 15

The number of pair(s) of sex chromosomes in the zygote of humans is

One

Two

Three

Four

10 / 15

Which of the subsiquent is not a direct conclusion that can be drawn from Mendels experiment?

Only one parental trait is expressed.

Two copies of each trait are inherited in sexually reproducing organism

For recessive trait to be expressed, both copies should be identical

Natural selection can alter frequency of an inherited trait.

11 / 15

Which one is a Feasible progeny in F2 generation of pure bred tall plant with round seed and dwarf plant with wrinkled seeds?

Tall plant with round seeds

Tall plant with wrinkled seeds

Dwarf plant with round seed

All of the above

12 / 15

Select the inappropriate statement:

The frequency of certain genes in a population change over several generations resulting in evolution.

The reduction in the weight of an 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.

13 / 15

Select the accurate statement:

The tendril of a pea plant and the phylloclade of Opuntia are homologous.

The tendril of a pea plant and the phylloclade of Opuntia are analogous.

The wings of birds and the limbs of lizards are analogous

The wings of bird and the wings of bats are homologous.

14 / 15

Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that:

Reptiles have evolved from birds

There is no evolutionary connection between reptiles and birds.

Feathers are homologous structures in both the organisms.

Birds have evolved from reptiles.

15 / 15

In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:

1 : 3

3:01

1:01

2:01

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Science : Ch 09 – Heredity and Evolution

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