A farmer intends to artificially inseminate cows with semen from a bull which has been chosen based on characteristics of colour and muscle mass which has been chosen based on characteristics of colour and muscle mass - HSC - SSCE Biology - Question 10 - 2020 - Paper 1
Question 10
A farmer intends to artificially inseminate cows with semen from a bull which has been chosen based on characteristics of colour and muscle mass which has been chose... show full transcript
Worked Solution & Example Answer:A farmer intends to artificially inseminate cows with semen from a bull which has been chosen based on characteristics of colour and muscle mass which has been chosen based on characteristics of colour and muscle mass - HSC - SSCE Biology - Question 10 - 2020 - Paper 1
Step 1
A. gene flow.
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Answer
Gene flow refers to the transfer of genetic material between populations, leading to an increase in genetic diversity. In this scenario, the introduction of a recessive allele from the bull to the cows represents gene flow, as genetic material is moving into a population from an outside source.
Step 2
B. genetic drift.
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Genetic drift is the random change in allele frequencies within a population, often due to chance events. This is not applicable here, as the allele's introduction is not random but intentional.
Step 3
C. natural selection.
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Natural selection is the process where individuals with favorable traits are more likely to reproduce. This scenario does not illustrate natural selection, as the introduction of the allele does not depend on its survival advantage in the current environment.
Step 4
D. selective breeding.
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Selective breeding is the process where humans breed plants and animals for particular genetic traits. This scenario also applies, as the farmer is choosing specific characteristics for breeding; however, the most significant aspect is gene flow.
