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Compare the chromosomes of the two plant species - VCE - SSCE Biology - Question 20 - 2021 - Paper 1
Question 20
Compare the chromosomes of the two plant species. The differences seen in the chromosomes of Plant species 2 compared to the chromosomes of Plant species 1 can be d... show full transcript
Worked Solution & Example Answer:Compare the chromosomes of the two plant species - VCE - SSCE Biology - Question 20 - 2021 - Paper 1
Step 1
Describe the differences seen in the chromosomes of Plant species 2 compared to the chromosomes of Plant species 1 as aneuploidy.
Answer
Aneuploidy refers to a condition in which the number of chromosomes is not an exact multiple of the haploid number, meaning that there is an addition or deletion of one or more chromosomes. In this case, if Plant species 2 has more or fewer chromosomes than expected based on the pattern seen in Plant species 1, it would be classified as aneuploidy.
Step 2
Describe the differences seen in the chromosomes of Plant species 2 compared to the chromosomes of Plant species 1 as polyploidy.
Answer
Polyploidy is a condition where a species has more than two sets of chromosomes. If Plant species 2 exhibits this characteristic, it may indicate that it has undergone events like whole-genome duplication. For example, if Plant species 2 displays a greater number of chromosomes that are multiples of a base number, this suggests polyploidy.
Step 3
Describe the differences seen in the chromosomes of Plant species 2 compared to the chromosomes of Plant species 1 as triploidy.
Answer
Triploidy is a form of polyploidy characterized by having three sets of chromosomes instead of the usual two. Observing that Plant species 2 contains three times the haploid number of chromosomes indicates that it exhibits a triploid condition, which may lead to fertility issues in plants.
Step 4
Describe the differences seen in the chromosomes of Plant species 2 compared to the chromosomes of Plant species 1 as trisomy.
Answer
Trisomy is a specific type of aneuploidy where an individual has three copies of a particular chromosome instead of the normal two. If in Plant species 2 there is an extra copy of any particular chromosome, it would indicate a trisomy and contribute to genetic variation.