Photo AI
28 (6 marks) (a) Explain how ONE named process that occurs during meiosis results in genetic variation - HSC - SSCE Biology - Question 28 - 2008 - Paper 1
Question 28
28 (6 marks) (a) Explain how ONE named process that occurs during meiosis results in genetic variation. (b) Why is genetic variation important in the survival of a... show full transcript
Worked Solution & Example Answer:28 (6 marks) (a) Explain how ONE named process that occurs during meiosis results in genetic variation - HSC - SSCE Biology - Question 28 - 2008 - Paper 1
Step 1
Explain how ONE named process that occurs during meiosis results in genetic variation.
Answer
One significant process during meiosis that leads to genetic variation is crossing over. This occurs during prophase I when homologous chromosomes pair up and form tetrads. While in this configuration, sections of chromatids may exchange genetic material, resulting in new combinations of alleles. This genetic reshuffling significantly increases genetic diversity, which is crucial for evolution and adaptation.
Step 2
Why is genetic variation important in the survival of a species?
Answer
Genetic variation is essential for the survival of a species because it enhances the ability of populations to adapt to changing environments. For instance, when a population faces a new disease or shift in climate, individuals with genetic traits that confer an advantage (such as resistance to disease or better heat tolerance) are more likely to survive and reproduce. This leads to a stronger population that can withstand environmental challenges, ultimately ensuring the species' survival over time.