2020HSCShort answer

Q28 (a)

3 marks

Question

A student drew a diagram to model part of the process of meiosis.
Explain the misunderstanding of meiosis shown in this model.

Try the question before revealing the answer.

Solution

Criteria	Marks
• Explains the misunderstanding of meiosis shown in the model	3
• Describes in general terms the misunderstanding shown in the model	2
• Provides some relevant information	1

Sample answer:

The paired homologous chromosomes are incorrectly drawn. In a pair of chromosomes, one is paternal and the other is maternal. Prior to crossing over, each chromosome duplicates itself forming two chromatids and they should be identical, that is both chromatids should be either maternal or paternal and not different as shown in the model.

Supplied marking guidance · human reviewed

Compare this with your working, not only your final sentence.

Syllabus alignment

Module 5 · Heredity

Cell ReplicationModel mitosis, meiosis and DNA replication using nucleotide pairing and bonding.

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