Heredity
CBSE Class 10 Science · every board question from this chapter, 2022–2026
- The genotype of green stemmed tomato plant is denoted by 'GG' and that of purple stemmed tomato plant as 'gg'. Hybrid of a cross…2026
- Identify the traits that cannot be transmitted from parents to the off- springs: (i) Swimming technique (ii) Blood group (iii)…2026
- Two pea plants, one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds were crossed with each other…2026
- Assertion: Bacteria that can withstand heat have better chances of survival in a heat wave. Reason (R): Accumulation of…2026
- Do all variations in a species have equal chances of surviving in the environment in which they find themselves? Explain.2026
- Use the following information for Pea plants: Dominant allele for tall plants - T Recessive allele for short plants - t Dominant…2026
- A blue colour flower (BB) bearing plant is crossed with a plant with white coloured flowers (bb). State the colour of the flowers…2026
- Based on Mendel's experiment show the cross between round, yellow seeds of pea plant (RRYY) with wrinkled and green seeds of pea…2026
- Study the given table and answer the following questions: Depict the information given in the table in the form of a cross.…2026
- Show the cross and observations made by Mendel when he crossed pure tall pea plant with a pure short pea plant to get F_1 progeny.2026
- Giving two examples, justify the statement that the sex of the offspring in all animals is not always genetically determined.…2026
- Show a cross between a pea plant having round \& green seed with a pea plant having wrinkled and yellow seeds upto F_2…2026
- Mendel took garden pea plants with different characteristics, such as height to study the inheritance pattern of factors (genes).…2026
- A tall pea plant with round seeds (TTRR) is crossed with a short pea plant with wrinkled seeds (ttrr). The F_1 generation will be2025
- Mendel obtained F_2 generation by2025
- When a pure-tall pea plant is crossed with a pure-dwarf pea plant, the percentage of tall pea plants in F_1 and F_2 generation…2025
- If pea plants with round and green seeds (RRyy) are crossed with pea plants having wrinkled and yellow seeds (rrYY), the seeds…2025
- Assertion: A mango seed will germinate to form a mango tree. Reason (R): Heredity determines the process by which traits and…2025
- Assertion: A human child bears all the basic features of human beings. Reason (R): It looks exactly like its parents, showing…2025
- Assertion: In reptiles, the temperature at which the fertilized eggs are kept decides the sex of the offsprings. Reason (R): Sex…2025
- "Proteins control the expression of various characters." Explain this statement by taking an example of "tallness" as a…2025
- Explain how the proteins control the 'characteristics' in an organism with the help of an example of 'short height' trait in pea…2025
- Explain with the help of a flow chart that in human beings father is responsible for the sex (male or female) of the child.2025
- "Sex of the children is determined by type of sex chromosome which they inherit from their father." Justify the statement.2025
- Pure-tall (TT) pea plants are crossed with pure-dwarf (tt) pea plants. The pea plants obtained in F_1 generation are then self…2025
- Explain how the proteins control the 'characteristics' in an organism with the help of an example of 'tallness' trait in pea…2025
- "In human beings the genes inherited from the parents decide whether the newborn individual is male or female." Explain this…2025
- A pure pea plant bearing terminal flowers was cross-pollinated with a pure plant having axillary flowers. In F_1 generation,…2025
- The lowest part of the ear called earlobe, is closely attached to the side of the head in some of us (Figure 'X'), and not in…2025
- A pure pea plant having round (R), yellow (Y) seeds is crossed with another pure pea plant having wrinkled (r), green (y) seeds.…2025
- How many chromosomes are present in human beings? Out of these how many are sex chromosomes? Explain how, in sexually reproducing…2025
- What are chromosomes? Explain in brief how stability of DNA content of a species is ensured in sexually reproducing organisms?2025
- The gene combination of purple flowered pea plants is denoted as (WW) and that of white flowered pea plants as (ww), when these…2025
- In one of Mendalian experiments, when F_1 generation pea plants with round yellow seeds were self-pollinated, pea seeds with the…2025
- In human beings, there are 23 pairs of chromosomes. Out of these 23 pairs of chromosomes (i.e. 46 chromosomes), 22 pairs of…2025
- Consider the following statements: (i) The sex of a child is determined by what it inherits from the mother. (ii) The sex of a…2024
- In an experiment to study independent inheritance of two separate traits: shape and colour of seeds, the ratio of the different…2024
- A cross between two tall pea plants resulted in offsprings having a few dwarf plants. The gene-combination of the parental plants…2024
- A cross made between two pea plants produces 50 % tall and 50 % short pea plants. The gene combination of the parental pea plants…2024
- Sex determination depends upon the environment in2024
- Assertion: Human female has a perfect pair of sex chromosome. Reason (R): Sex chromosome contributed by the human male in the…2024
- Assertion: Sex of the children will be determined by what they inherit from their mother. Reason (R): Women have XX sex…2024
- Assertion: In human beings, males have 'XX' sex chromosomes and females have 'XY' sex chromosomes. Reason (R): Sex of the child…2024
- List any two pairs of visible contrasting characters of garden pea plants used by Mendel for his experiments stating the dominant…2024
- Mendel crossed a round and yellow seeded pea plant with a wrinkled and green seeded pea plant. What did the plants of F_1…2024
- List any two pairs of visible contrasting characters of garden pea plants used by Mendel for his experiments stating the dominant…2024
- Mendel crossed pea plants with two pairs of contrasting characters. RRYY × rryy; Round, Yellow, Wrinkled, Green He observed 4…2024
- Explain how the original number of chromosomes present in the parents are restored in the progeny. Name the cell division by…2024
- Explain how equal genetic contribution of male and female parents is ensured in the progeny.2024
- List any two pairs of visible contrasting characters of garden pea plants used by Mendel for his experiments stating the dominant…2024
- List two differences between dominant traits and recessive traits. What percentage of pea plants in the F_2 generation were with…2024
- How is the sex of a newborn individual determined in different species of animals? Give three examples to support your answer.2024
- A plant with violet flowers (VV) was crossed with a plant with white flowers (vv). What colour of flowers was obtained in the…2024
- Mendel crossed pure tall pea plants (TT) with pure short pea plants (tt) and obtained F_1 progeny. When the plants of F_1 progeny…2024
- Name any two pairs of contrasting characters other than height used by Mendel in his experiments. On crossing a tall and a short…2024
- Name any two sexually transmitted diseases. Prenatal sex determination is prohibited by law. Why? Name any three methods of…2024
- Mendel worked out the rules of heredity by working on garden pea using a number of visible contrasting characters. He conducted…2024
- In an experiment with pea plants, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plant to…2023
- Consider the following two statements: (i) The trait that expresses itself in F_1 generation. (ii) The trait that keeps on…2023
- The statement that correctly describes the characteristic(s) of a gene is:2023
- A cross between pea plant with white flowers (vv) and pea plant with violet flowers (VV) resulted in F_2 progeny in which ratio…2023
- Which pair of sex chromosome will determine a male?2023
- Which one of the given statements is incorrect:2023
- Assertion: Human populations show a great deal of variations in traits. Reason (R): All variations in a species have equal…2023
- Assertion: Genes inherited from the parents decide the sex of a child. Reason (R): X chromosome in a male child is inherited from…2023
- Assertion: In humans, if gene is responsible for black eyes and gene is responsible for brown eyes, then the colour of eyes of…2023
- Mendel crossed a pure tall pea plant (TT) with a pure short pea plant (tt) and obtained all tall plants in F_1 generation. What…2023
- In order to trace the inheritance of traits Mendel crossed pea plants having one contrasting character or a pair of contrasting…2023
- The most obvious outcome of the reproductive process is the generation of individuals of similar design, but in sexual…2023
- All human chromosomes are not paired. Most human chromosomes have a maternal and a paternal copy, and we have 22 such pairs. But…2023
- In order to trace the inheritance of traits Mendel crossed pea plants having one contrasting character or a pair of contrasting…2023
- The most obvious outcome of the reproductive process is the generation of individuals of similar design, but in sexual…2023
- In order to trace the inheritance of traits Mendel crossed pea plants having one contrasting character or a pair of contrasting…2023
- In some families, either rural or urban, females are tortured for giving birth to a female child. They do not seem to understand…2023
- Using height (tallness / dwarfness) of a plant as an example, show that genes control the characteristics or traits in an…2022
- What is variation? List two main reasons that may lead to variation in a population. OR (i) In a cross between violet flowered…2022
- Mendel crossed two pea plants with visible contrasting characteristics and found that there were no half-way characteristics in…2022
- A red-eyed individual is crossed with a white-eyed individual to produce F_1 progeny with red eyes. When F_1 individuals are…2022
- What are Chromosomes? Explain how stability of the DNA of the species is ensured in sexually reproducing organisms.2022
- A green stemmed tomato plant denoted by (GG) is crossed with a tomato plant with purple stem denoted by (gg). (i) What colour of…2022
- A cross was made between green-stemmed tomato plants denoted by (GG) and purple-stemmed tomato plants denoted as (gg) to obtain…2022
- How do Mendel's experiments show that the traits are inherited independently? Explain.2022
- Mendel blended his knowledge of Science and mathematics to keep the count of the individuals exhibiting a particular trait in…2022
- The mechanism by which the sex of an individual is determined is called sex-determination. In human beings, sex of a newborn is…2022
- Mendel blended his knowledge of Science and mathematics to keep the count of the individuals exhibiting a particular trait in…2022
- Sex of an individual is determined by different factors in various species. Some animals rely entirely on the environmental cues,…2022
- The mechanism by which the sex of an individual is determined is called sex-determination. In human beings, sex of a newborn is…2022
- Sex of an individual is determined by different factors in various species. Some animals rely entirely on the environmental cues,…2022
- Sex of an individual is determined by different factors in various species. Some animals rely entirely on the environmental cues,…2022
- Mendel blended his knowledge of Science and mathematics to keep the count of the individuals exhibiting a particular trait in…2022
- The mechanism by which the sex of an individual is determined is called sex-determination. In human beings, sex of a newborn is…2022
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