CBSE Class 10 Biology: Heredity
Very Short Answer Questions - Your Key to Success
Q1. Define variation.
Answer: Subtle DNA changes that occur in the reproduction process (sexual or asexual) that gives offsprings look similar to parents.
Q2. Which has more variation asexual or sexual mode of reproduction?
Answer: Sexual mode of reproduction.
Q3. Are variations always beneficial?
Answer: Not necessary. Some variations may be harmful to an individual, while others may be neutral. However, some variations may be beneficial, allowing an individual to have a better chance of surviving and reproducing.
Q4. What is DNA?
Answer: DNA is the carrier of hereditary information from parents to the next generation.
Q5. What is heredity?
Answer: The transmission of characteristics from one generation to another is known as heredity.
Q6. Where is DNA found in a cell?
Answer: DNA is found in the cell nucleus
Q7. What is a gene?
Answer: DNA is the genetic blueprint of life, and genes are the specific instructions within DNA that tell cells how to make proteins and enzymes.
Q8. Name the information source for making proteins in the cells.
Answer: Cellular DNA
Q9. Who is known as the Father of Genetics?
Answer: Gregor Mendel
Q10. Name the Plant selected by Mendel to study the laws of inheritance.
Answer: Pisum sativum (garden pea)
Q11. What was the phenotype ratio in the case of monohybrid F2 progeny?
Answer: 3:1 (3 Tall: 1 Short)
Q12: In the case of a dihybrid cross i.e., involving two pairs of contrasting characters, what was the phenotypic ratio obtained in F2 generation?
Answer: 9: 3: 3: 1
Q13: If a round, green-seeded pea plant (RRyy) is crossed with a wrinkled, yellow-seeded pea plant, (rrYY) the seeds produced in F1 generation are ___________.
Answer: round and yellow
Q14. A zygote which has an X-chromosome inherited from the father will develop into a __________.
Answer: boy.
Q15. Mendel took tall pea plants and short pea plants and produced F1 progeny through crossfertilisation. What did Mendel observe in the F1 progeny?
Answer: All pea plants were tall in the F1 generation
Q16. A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 progeny?
Answer: Violet flowers.
Q17. Different species use different strategies to determine the sex of a newborn individual. It can be environmental cues. Give an example supporting this strategy.
Answer: In some animals, the temperature at which fertilised eggs are kept determines whether the developing animal in an egg is male or female.
Q18. What is DNA copying?
Answer: DNA replication or DNA copying is the process of producing two identical replicas from one original DNA molecule during cell division.
Q19. What is a dominant trait?
Answer: The trait which expresses itself in F1 (first) generation after crossing contrasting (opposite) traits is known as the dominant character (trait).
Q20. What is a recessive trait?
Answer: The trait not expressed in the F1 (first) generation after crossing contrasting (opposite) traits.
Q21. List two contrasting visible characters of garden pea Mendel used for his experiment.
Answer: Round / Wrinkled seeds
Tall / Short plants
White / Purple flowers
Green / Yellow seeds
ЁЯСЙSEE ALSO:
Ch 9 - Heredity & Evolution (NCERT Solution, Q & A, Study notes)
Ch 9 - Heredity & Evolution (MCQs) or Eduvictors Quiz
Ch 9 - Heredity & Evolution (Important Terms and Definitions)
Heredity and Evolution - Origin Of Life On Earth (Concept Points)
Ch 9 - Heredity and Evolution - Unit Test Paper
Oswaal CBSE Sample Question Papers Class 10 Science Book (For Board Exams 2024) | 2023-24
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