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Heredity and Evolution - Biology Class 10 | Shiksha Nation
Q&A Home
Class 10
CBSE
Biology
Heredity and Evolution
🧬
Chapter 4
Heredity and Evolution
Biology
•
Class 10
•
CBSE
18 Questions Available
Showing 18 questions on this page
1
• What are chromosomes? Where are they seated? • What is a sex chromosome? • Explain the mechanism of sex determination in human beings.
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2
How do sexual and asexual reproduction lead to speciation? Give one point for each.
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3
List any two factors that could lead to speciation.
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4
Give one example of each of the characters that are inherited and the ones that are acquired in humans. Mention the difference between the inherited and the acquired characters.
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5
For two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below: a. Both A and R are true, and R is correct explanation of the assertion. b. Both A and R are true, but R is not the correct explanation of the assertion. c. A is true but R is false. d. A is false but R is true. Assertion: A child which has inherited X chromosome from father will develop into a girl child. Reason: Girl child inherits X chromosome from father and Y chromosome from mother.
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6
For two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below: a. Both A and R are true, and R is correct explanation of the assertion. b. Both A and R are true, but R is not the correct explanation of the assertion. c. A is true but R is false. d. A is false but R is true. Assertion: ln grasshoppers, females are hetero gametic and males are homo gametic. Reason: ln grasshoppers, male has only one sex chromosome (XO) whereas the female has sex chromosomes (XX).
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7
What is geographical isolation? (b) Illustrate formation of a species with the help of an example where individuals are very different from each other and are capable of reproduction among themselves.
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8
• What is genetics? • Give the common name of the plant on which Mendel performed his experiments. • What for did Mendel use the term factors and what are these factors called now? • What are genes? Where are the genes located?
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9
List four tools used to study evolutionary relationships.
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10
(a) Write foil form of DNA. (b) Why are variations essential for the species ? (CCE 2011)
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11
(a) Write foil form of DNA. (b) Why are variations essential for the species ? (CCE 2011)
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12
Describe briefly four ways in which individuals with a particular trait may increase in population.
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13
What is speciation?
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14
What is gene?
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15
What is the function of genes in an organism?
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16
In terms of evolution, what is the significance of homology between a human hand and a wing of a bird?
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17
“Variations that confer an advantage to an individual organism only will survive in a population.” Justify.
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18
“The sex of the children are determined by what they inherit from their father and not the mother.” Justify.
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