Biology 0610 · IGCSE · Sexual reproduction in plants
Sexual reproduction in plants — practice question
A scientist studied sexual reproduction in flowering plants. Fig. 2.1 illustrates how two plants of the same species are crossed. The offspring displayed phenotypic variation, yet they had the same chromosome number as the parent plants.
(a(i))[2]
Define chromosome.
(a(ii))[1]
Suggest why the scientist put a bag around flower 1.
(a(iii))[2]
Explain how sexual reproduction produces the variation that the scientist found in the offspring plants.
(a(iv))[2]
Explain how the chromosome number stays the same from one generation to the next.
(b(i))[3]
Complete Table 2.1 by stating all possible offspring genotypes that could arise from these parent plants.
(b(ii))[1]
State the type of inheritance shown by petal colour in C. japonica.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “a long, thread-like DNA strand / molecule” …