Biology 9700 · AS & A Level · Passage of information from parents to offspring

Passage of information from parents to offspring — practice question

Lunularia cruciata is a primitive plant. The plant body is a flattened sheet of photosynthetic tissue, known as a thallus. Fig. 5.1 depicts L. cruciata with two different reproductive structures, labelled A and B, on its surface.
(a)[2]

Explain the meaning of haploid.

(b)[3]

Identify which of the structures A, B, C and D are associated with sexual reproduction, are produced by mitosis, and are the site of meiosis. Each letter may be used once, more than once, or not at all.

(c)[3]

Fig. 5.2 shows a horse, Equus caballus. Horses are diploid animals and reproduce sexually. Male and female horses make gametes, which fuse to produce genetically different offspring. Explain the need for a reduction division during meiosis in the production of gametes in animals such as horses.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: a single complete chromosome set

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI