Consider the following two statements: (i) The trait that expresses itself in generation. (ii) The trait that keeps on passing from one generation to another. The appropriate terms for the statements (i) and (ii) respectively are:
Consider the following two statements: (i) The trait that expresses itself in generation. (ii) The trait that keeps on passing from one generation to another. The appropriate terms for the statements (i) and (ii) respectively are:
Options
Official answer
The correct option is (c).
- Statement (i) describes a dominant trait, which is the trait that expresses itself in the first generation ( progeny) when contrasting traits are crossed.
- Statement (ii) describes an inherited trait, which is a characteristic that is passed down from one generation to the next through genetic material.
Marking scheme
- 1.1 mark for identifying the correct option (c) with correct terms.
Hint
Recall that the trait which is visible in the generation is dominant, and any trait that is passed from parents to offspring is an inherited trait.
Quick oral answer
A dominant trait is one that expresses itself in the generation even if only one copy is present, whereas an inherited trait is any characteristic passed from parents to offspring.
Common mistakes
- 1.Students might confuse 'inherited trait' with 'recessive trait' or assume that only dominant traits are passed down, whereas both dominant and recessive traits are inherited.
Analysis and explanation
According to the NCERT text, in Mendel's experiments, only one of the parental traits was expressed in the generation (e.g., all tall plants, no medium-height plants). This trait is called the dominant trait. On the other hand, traits that are passed from previous generations to the next are called inherited traits. Therefore, statement (i) corresponds to 'Dominant trait' and statement (ii) corresponds to 'Inherited trait', making option (c) the correct choice.
- Option (a) is incorrect because statement (i) is dominant, not recessive.
- Option (b) is incorrect because statement (ii) refers to any trait passed down (inherited), not specifically a recessive trait.
- Option (d) is incorrect because statement (i) is dominant, not recessive.
Interesting facts
Mendel used the term 'factors' for what we now call 'genes' to explain how traits are inherited across generations.
Question details
Q10 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2023
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- Heredity
- Topic
- Rules for the Inheritance of Traits – Mendel's Contributions
- Bloom's level
- Understanding
- Syllabus topic
- Heredity; Mendel's contribution- Laws for inheritance of traits
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2023?
This question carries 1 mark in the CBSE Class 10 Science 2023 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Heredity" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Rules for the Inheritance of Traits – Mendel's Contributions" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2023 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.