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Heredity & Evolution - 1 - Class 10 MCQ


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10 Questions MCQ Test Science Class 10 - Heredity & Evolution - 1

Heredity & Evolution - 1 for Class 10 2024 is part of Science Class 10 preparation. The Heredity & Evolution - 1 questions and answers have been prepared according to the Class 10 exam syllabus.The Heredity & Evolution - 1 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Heredity & Evolution - 1 below.
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Heredity & Evolution - 1 - Question 1

Select the incorrect statement.

Detailed Solution for Heredity & Evolution - 1 - Question 1

Weight of body depends on diet and habits. If somebody is not eating he will definitely lose weight as the body fat will be used for production of energy once glycogen reserve finishes.

Heredity & Evolution - 1 - Question 2

Differences between organisms in a species are described as variation. Which of the following would you describe as continuous variation?

Detailed Solution for Heredity & Evolution - 1 - Question 2

Continuous variation can be defined as the variations in the phenotypic traits in which a series of types are distributed on a continuum rather than separate groups. For example body weight.

Heredity & Evolution - 1 - Question 3

New species may be formed if
(i) Mating does not take place.
(ii) DNA undergoes significant changes in germ cells.
(iii) There is no change in genetic material.
(iv) Chromosome number changes in gametes.

Detailed Solution for Heredity & Evolution - 1 - Question 3

New species may be formed if DNA undergoes significant change in germ cells. Changes in DNA will be inherited by the germ cells. Germ cells which when passes to the next generation will be inherited in the subsequent generations.

Change in the chromosome number makes a change in the gametes which leads to change in the gene pool and causes variation. 

Heredity & Evolution - 1 - Question 4

Which of the following is an example of genetic variation ?

Detailed Solution for Heredity & Evolution - 1 - Question 4

Different eye colour is a genetic variation.

Heredity & Evolution - 1 - Question 5

The earlobe variants found in human population are
(i) Free
(ii) Curved
(iii) Round
(iv) Attached

Detailed Solution for Heredity & Evolution - 1 - Question 5

 

The earlobe variants found in human population are free and attached.
EXPLANATION:-
All the human beings have two types of earlobes.
One of such earlobes are the attached earlobes which are attached to the skin of human being near his or her ear . 2nd earlobes are the earlobes which are not so attached rather they are hanged freely

Heredity & Evolution - 1 - Question 6

Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce FI progeny that have round yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters.
Choose the new combination from the following
(i) Round, yellow
(ii) Round, green
(iii) Wrinkled, yellow
(iv) Wrinkled, green

Detailed Solution for Heredity & Evolution - 1 - Question 6

Parents: RRyy (Round green) X rrYY (Wrinkled Yellow)

Gametes: Ry rY

F1: RrYy

Selfing of F1: RrYy (Round yellow) X RrYy (Round yellow)

Gametes: RY, Ry, rY and ry X RY, Ry, rY and ry

F2: RRYY, RRYy, RrYY, RrYy (Round yellow)

RRYy, RRyy, RrYy, Rryy (Round yellow)

RrYY, RrYy, RrYy, Rryy, (Round yellow)

rrYY, rrYy, rrYy (Wrinkled yellow)

rryy (Wrinkled green)

The new combination of characters are: Round yellow and Wrinkled green. apart from parental combinations - Round green and Wrinkled yellow.

Heredity & Evolution - 1 - Question 7

Your mother bought carrot, potato, radish and brinjal. Which of them represent the correct homologus structures ?

Detailed Solution for Heredity & Evolution - 1 - Question 7

Both are modifications of root while potato is a stem modification and brinjal is a fruit.

Heredity & Evolution - 1 - Question 8

Select the correct statement.​

Detailed Solution for Heredity & Evolution - 1 - Question 8

1. Wing of a bird and wing of a bat are analogous.

Analogous structures are those that have evolved independently to serve a similar function but do not share a common ancestor. The wings of birds and bats are similar in function (both are used for flying), but they have evolved independently in these different groups of animals.

Heredity & Evolution - 1 - Question 9

Select the correct statement.

Detailed Solution for Heredity & Evolution - 1 - Question 9

Both thorn of Bougainvillea and potato are modification of stem.

Heredity & Evolution - 1 - Question 10

Some dinosaurs had feathers but they could not fly but birds have feathers that help them to fly. In terms of evolution it means

Detailed Solution for Heredity & Evolution - 1 - Question 10

There are certain fossils of ancient reptiles which have both reptilian as well as feature of birds which proves that birds have evolved from reptiles.

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