Sexual Reproduction in Flowering Plants

36 solved questions from Class 12 Biology, each with the full working. Tap any question to see the step-by-step solution.

• 1 What is the primary topic or theoretical principle explored in 'Sexual Reproduction in Flowering Plants' (Class 12 BIOLOGY)? medium MCQ Chapter Core Principle
• 2 Which key mechanism or analytical rule is highlighted in 'Sexual Reproduction in Flowering Plants'? medium MCQ Key Analytical Mechanism
• 3 What is the primary topic or principle explained in 'Sexual Reproduction in Flowering Plants' (Class 12 Biology)? medium MCQ Chapter Core Concept
• 4 Which key observation or fact is central to understanding 'Sexual Reproduction in Flowering Plants'? medium MCQ Key Fact & Mechanism
• 5 Why is the study of 'Sexual Reproduction in Flowering Plants' important for students of Class 12? medium MCQ Learning Significance
• 6 What is a common application or real-world example related to 'Sexual Reproduction in Flowering Plants'? medium MCQ Real World Application
• 7 What key takeaway should students retain after completing 'Sexual Reproduction in Flowering Plants'? medium MCQ Chapter Summary & Takeaway
• 8 Explain the sequence of cellular events from pollen tube arrival at the ovule to the formation of the zygote and the endosperm in a flowering plant. medium 2 marks Double fertilisation
• 9 Which type of pollination occurs in the pea plant (Pisum sativum) if the stigma receives pollen from the same flower's anther? easy MCQ 1 mark Mode of pollination
• 10 Describe the stages of fruit development in the tomato plant (Solanum lycopersicum) after fertilisation and classify the type of fruit it produces. hard 4 marks Fruit development
• 11 A diploid flowering plant has chromosome number 2n=12 (i.e., n=6). Assuming each of the six chromosomes can independently assort during meiosis, how many distinct haploid gamete combinations are theoretically possible? hard 3 marks Independent assortment
• 12 The apple (Malus domestica) produces a fruit that is classified as a pome. Explain the developmental process from fertilisation to maturity, including the formation of the edible part and the seeds, and discuss how the structure of a pome aids in seed dispersal. hard 4 marks Pome fruit development
• 13 In a self‑pollinating flowering plant, pollen grains from the same flower land on its stigma. This mode of pollination is known as ___. easy MCQ 1 mark Self‑pollination types
• 14 A diploid ornamental plant has a chromosome number 2n = 14 (n = 7). During meiosis, each chromosome pair can assort independently, and for each pair, crossing over can produce four different recombinant chromatids. How many distinct haploid gamete combinations are possible? hard 5 marks Independent assortment & crossing over
• 15 Describe the stages of pollen tube growth from the anther to the ovule in a flowering plant and explain why each stage is important. medium 2 marks Pollen tube guidance
• 16 Explain in detail the process of double fertilization in a flowering plant, including the roles of the two sperm cells, the formation of zygote and endosperm, and the significance of this process for seed development. hard 5 marks Double fertilization mechanism in angiosperms
• 17 A diploid plant has chromosome number 2n = 20. During meiosis, each chromosome pair can assort independently and each pair can produce two recombinant chromatids due to crossing over. Assuming independent assortment and recombination, how many distinct haploid gamete combinations are theoretically possible? hard 5 marks Gamete number from independent assortment and recombination
• 18 Which mode of pollination is most likely in the grass species *Poaceae*? easy MCQ 2 marks Mode of pollination in wind‑pollinated plants
• 19 Describe the sequence of development of the embryo sac in angiosperms, starting from the megaspore mother cell. medium 3 marks Embryo sac development sequence
• 20 Describe the sequence of cellular events from pollen tube arrival at the ovule to the formation of the zygote and the endosperm in a flowering plant. Include the roles of the two sperm cells and the significance of each step for seed development. hard 5 marks Double fertilisation sequence
• 21 A diploid plant has chromosome number 2n = 18 (n = 9). Each chromosome pair can assort independently and for each pair, crossing over can produce four different recombinant chromatids. How many distinct haploid gamete combinations are theoretically possible? hard 5 marks Gamete combinatorial possibilities
• 22 A diploid plant has chromosome number 2n = 14 (n = 7). During meiosis each chromosome pair can assort independently and each pair can produce two recombinant chromatids due to crossing over. Assuming independent assortment and recombination, how many distinct haploid gamete combinations are theoretically possible? medium 2 marks Gamete diversity by recombination
• 23 During double fertilization in angiosperms, fusion of one sperm cell with the egg cell results in the formation of: easy MCQ 1 mark Double fertilisation
• 24 Which cell of the pollen grain is responsible for forming the endosperm during double fertilization in angiosperms? easy MCQ 1 mark Double fertilization
• 25 A diploid plant has chromosome number 2n=20. During meiosis, each chromosome pair can assort independently and can produce 4 different recombinant chromatids due to crossing over. Assuming independent assortment and recombination, how many distinct haploid gamete combinations are theoretically possible? hard 4 marks Independent assortment with recombination
• 26 For a diploid flowering plant with chromosome number 2n=12, how many distinct haploid gamete types can be produced solely by independent assortment? medium 2 marks Independent assortment
• 27 Describe the sequence of cellular events that occurs in the pollen tube after it has emerged from the stigma but before it reaches the ovule. Include the key signals and structures involved. medium 3 marks Pollen tube guidance
• 28 State any two pre‑zygotic barriers that can prevent fertilisation in flowering plants. medium 2 marks Pre‑zygotic reproductive isolation
• 29 A diploid flowering plant has chromosome number 2n = 24. During meiosis each chromosome pair can assort independently, and for each pair crossing over can generate three distinct recombinant chromatids in addition to the two parental chromatids (total 5 distinct chromatids per chromosome). Assuming independence and recombination, how many genetically distinct haploid gametes can be formed? medium 3 marks Genetic variation by independent assortment & crossing over
• 30 In which part of the flower are the male gametophytes (pollen grains) produced? easy MCQ 1 mark Site of microspore (pollen) formation
• 31 During double fertilization in angiosperms, fusion of the second sperm cell with the central cell results in formation of which structure? medium MCQ 2 marks Outcome of second fertilization event
• 32 Where are pollen grains produced in a flowering plant? easy MCQ 1 mark Location of pollen production
• 33 A diploid plant has chromosome number 2n=30. During meiosis each chromosome pair can assort independently, and for each pair crossing over can produce four distinct recombinant chromatids. Assuming independent assortment and recombination, how many distinct haploid gamete combinations are theoretically possible? hard 4 marks Meiosis, recombination, and independent assortment
• 34 Describe the sequence of cellular events that occurs in the pollen tube after it has emerged from the stigma but before it reaches the ovule, including the key signals and structures involved. hard 5 marks Pollen tube guidance and fertilization
• 35 During meiosis in a diploid flowering plant with chromosome number 2n=28, only independent assortment occurs (no crossing over). How many distinct haploid gamete combinations can be produced? easy 2 marks Independent assortment
• 36 Consider a diploid plant with chromosome number 2n=18. In meiosis, each chromosome pair can produce 5 distinct chromatids (including 3 recombinant and 2 parental). Assuming independent assortment of chromosome pairs, how many genetically distinct haploid gametes can be formed? hard 5 marks Recombinant gamete calculation