Name:
(a) This disorder
(b) The phase in meiosis when non-disjunction occurs
(c) The type of mutation that is a result of non-disjunction
(4)
Homo sapiens
0,2–0
1 450
1.6.1 Name:
(a) TWO hominid genera in the table above
(b) TWO fossils of A - NSC Life Sciences - Question 1 - 2019 - Paper 2
Question 1
Name:
(a) This disorder
(b) The phase in meiosis when non-disjunction occurs
(c) The type of mutation that is a result of non-disjunction
(4)
Homo sapiens
0,2... show full transcript
Worked Solution & Example Answer:Name:
(a) This disorder
(b) The phase in meiosis when non-disjunction occurs
(c) The type of mutation that is a result of non-disjunction
(4)
Homo sapiens
0,2–0
1 450
1.6.1 Name:
(a) TWO hominid genera in the table above
(b) TWO fossils of A - NSC Life Sciences - Question 1 - 2019 - Paper 2
Step 1
This disorder
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Answer
The disorder is identified as Down syndrome, which is associated with non-disjunction during meiosis.
Step 2
The phase in meiosis when non-disjunction occurs
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Answer
Non-disjunction can occur during Anaphase I or Anaphase II of meiosis.
Step 3
The type of mutation that is a result of non-disjunction
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Answer
The mutation resulting from non-disjunction is known as aneuploidy.
Step 4
TWO hominid genera in the table above
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Answer
Sahelanthropus
Australopithecus
Step 5
TWO fossils of A. africanus that were found in South Africa
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Answer
Taung child
Mrs. Ples
Step 6
The genus that appeared first on Earth as shown in the table
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Answer
Sahelanthropus
Step 7
Which hominid had a cranial capacity closest to that of Homo sapiens?
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Answer
Homo neanderthalensis had a cranial capacity close to that of Homo sapiens.
Step 8
Give the smallest cranial capacity (in cm³) of a Homo species.
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Answer
The smallest cranial capacity of a Homo species is 650 cm³.
Step 9
When did Australopithecus africanus become extinct?
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Answer
Australopithecus africanus became extinct approximately 2 million years ago.
Step 10
Name TWO other lines of evidence.
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