Biology · Class 10 CBSE
A tall pea plant (TT) is crossed with a short pea plant (tt). All the offspring are tall. What does this indicate?
A child has curly hair like the father but eye colour like the mother. Which statement best explains this observation?
A scientist observes that two siblings have different heights and facial features despite having the same parents. What is the best explanation?
A gardener wants all the new plants to have flowers of the exact same colour and size as the parent plant. Which method should be preferred?
A blue-eyed mother and a brown-eyed father have children. Which statement is always correct?
A student says, \"All variations are inherited.\" Which example proves this statement is incorrect?
Why is genetic variation important for the survival of a species?
In a family, a trait appears in the grandparents and grandchildren but not in the parents. Which explanation is most appropriate?
Which situation represents an acquired trait rather than an inherited trait?
A farmer repeatedly uses seeds from only one type of crop. After a disease outbreak, most plants are affected. Which concept best explains this?
Type your answer in your own words. On submit, our AI examiner grades each answer, gives feedback, and shows the model answer.
Differentiate between inherited traits and acquired traits with one example of each.
2 marksWhy did Mendel choose pea plants for his experiments? State any two reasons.
2 marksExplain why variation among individuals of the same species is considered beneficial.
2 marksA homozygous tall pea plant is crossed with a homozygous short pea plant. State: - The genotype of the offspring. - Their phenotype.
2 marksWhy are inherited traits passed to the next generation, whereas acquired traits are generally not?
2 marksMendel crossed a pure tall pea plant (TT) with a pure short pea plant (tt). Answer the following: - Explain the F₁ generation. - Show the cross using suitable genotypes. - State the phenotype and genotype of the offspring. - What conclusion did Mendel draw from this experiment?
5 marksExplain the significance of variation in organisms. In your answer, include: - How variation arises. - Difference between inherited and acquired variation. - Importance of variation in evolution and survival.
5 marksCase study: A farmer grows two varieties of tomato plants. One variety is highly resistant to disease, while the other is not. After several seasons, he notices that plants with greater genetic variation survive changing weather conditions and disease attacks more successfully. Answer the following: (a) Why are genetically varied plants more likely to survive environmental changes?
1 markCase study: A farmer grows two varieties of tomato plants. One variety is highly resistant to disease, while the other is not. After several seasons, he notices that plants with greater genetic variation survive changing weather conditions and disease attacks more successfully. Answer the following: (b) Which type of reproduction generally produces greater genetic variation?
1 markCase study: A farmer grows two varieties of tomato plants. One variety is highly resistant to disease, while the other is not. After several seasons, he notices that plants with greater genetic variation survive changing weather conditions and disease attacks more successfully. Answer the following: (c) Name one scientist whose experiments helped explain how traits are inherited.
1 markCase study: A farmer grows two varieties of tomato plants. One variety is highly resistant to disease, while the other is not. After several seasons, he notices that plants with greater genetic variation survive changing weather conditions and disease attacks more successfully. Answer the following: (d) Explain why acquired traits, such as pruning a branch or removing a leaf, are not passed on to the next generation.
1 mark