3.1 Mary
(MARK FIRST ONE ONLY)
3.1.1 There are no matching bands/bars/pattern/DNA profile with both parents - NSC Life Sciences - Question 3 - 2017 - Paper 2
Question 3
3.1 Mary
(MARK FIRST ONE ONLY)
3.1.1 There are no matching bands/bars/pattern/DNA profile with both parents.
3.2
3.2.1 Three
3.2.2
A^ and i^ (or ii)
(MARK FIRS... show full transcript
Worked Solution & Example Answer:3.1 Mary
(MARK FIRST ONE ONLY)
3.1.1 There are no matching bands/bars/pattern/DNA profile with both parents - NSC Life Sciences - Question 3 - 2017 - Paper 2
Step 1
Mary
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Answer
Mary does not have matching bands or patterns in her DNA profile with both parents which confirms that she is not biologically related to them.
Step 2
Three
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Answer
The phenotypes of the blood groups inherited by the offspring include three distinct groups, confirming the genetic variation present.
Step 3
A^ and i^
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Answer
In the case of blood groups, the parental genotypes are A^ i^ for blood group A and ii for blood group O. This cross yields a phenotypic ratio of 1:1.
Step 4
1 allele from each parent
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Answer
Each individual inherits one allele from each parent. Specifically, the Y chromosome comes from the father while the recessive X chromosome is inherited from the mother.
Step 5
Determine time/day to collect data
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Answer
Select an area on the island, randomly capture a number of birds of the same species, measure their beaks before and during the drought, and record the number of birds with each beak size.
Step 6
Analyzed how beak size changed
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Answer
Compare the average beak size before and after the drought to determine the impact of food availability on the finch populations.
Step 7
Birds with smaller beaks
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Answer
During the drought, finches with larger beaks had a survival advantage due to their ability to access hard woody seeds.
Step 8
Range
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The observed range for beak size post-drought is between 9.8 mm and 10.3 mm.
Step 9
Cloning
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Cloning refers to the process of producing genetically identical organisms from a single parent.
Step 10
Oogenesis
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Oogenesis involves the development of oocytes through meiosis, resulting in the formation of gametes.
