NSC Life Sciences DNA: The Code of Life: 1.1 Various options are provided

Question

1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A to D) next to the question number in the ANSWER BOOK, for example 1.1.1 to 1.1.10.

1.1.1 When a cell divides by meiosis it results in ...
A four haploid gametes.
B two diploid gametes.
C four haploid somatic cells.
D two haploid somatic cells.

1.1.2 Individuals of the same species may show genetic variation due to ...
A mitosis and meiosis only.
B meiosis only.
C mutations, random mating and random fertilisation only.
D meiosis, mutations, random mating and random fertilisation.

QUESTIONS 1.3 and 1.4 ARE BASED ON THE DIAGRAM BELOW, WHICH REPRESENTS A tRNA MOLECULE.

1.1.3 The structure above is involved in the process of ...
A transcription.
B replication.
C translation.
D crossing over.

1.1.4 Molecule X represents ...
A DNA.
B an amino acid.
C a nucleic acid.
D artificial selection.

1.2 Give the correct biological term for each of the following descriptions. Write only the term next to the question number in the ANSWER BOOK.

1.2.1 A genetic cross involving two different characteristics.
1.2.2 The variety of life forms that exist on Earth.
1.2.3 The opening in the skull through which the spinal cord enters.
1.2.4 A group of organisms of the same species living in the same habitat at the same time.
1.2.5 A testable statement that can be accepted or rejected.
1.2.6 A genetic disorder resulting in the non-production of the clotting factor in blood.
1.2.7 Total disappearance of a species from Earth.
1.2.8 A segment of a chromosome that codes for a particular characteristic.
1.2.9 The ability of an organism to walk on two legs.

1.3 THREE babies (X, Y and Z) from three different sets of parents were born in a hospital. TWO of the babies were accidentally swopped. Blood groups of the parents and the babies are shown in the table below.
PARENTS
Mr and Mrs Pule
Mr and Mrs Tau
BABIES
X
Y
Z
B
O
AB

1.3.1 Which TWO babies (from X, Y and Z) were swopped?
1.3.2 Give the surnames of the biological parents of the two babies that were swopped. Write the correct surnames of the parents next to the letter (X, Y or Z).
1.3.3 Give the possible genotype(s) of Mr Pule that could have produced baby X.

1.4 The diagram below shows a karyotype.
1.4.1 How many of the following are present in the karyotype:
(a) Chromosomes
(b) Autosomes
(c) Gonosomes

1.4.2 How many chromosomes would be present in the gametes produced by this individual?
1.4.3 Is the karyotype in the diagram that of a male or a female?

1.5 The diagrams below represent a cell in two different phases of meiosis.
1.5.1 Which phase is represented in:
(a) Diagram 1
(b) Diagram 2

1.5.2 Provide labels for:
(A)
(B)
(C)

1.5.3 Give the functions of the parts labelled:
(A)
(B)

1.5.4 Are the cells in Diagram 2 haploid or diploid?

1.5.5 Name the process that would have caused variation in structure D.

1.1 Various options are provided as possible answers to the following questions - NSC Life Sciences - Question 1 - 2016 - Paper 2

Worked Solution & Example Answer:1.1 Various options are provided as possible answers to the following questions - NSC Life Sciences - Question 1 - 2016 - Paper 2

1.1.1 When a cell divides by meiosis it results in ...

1.1.2 Individuals of the same species may show genetic variation due to ...

1.1.3 The structure above is involved in the process of ...

1.1.4 Molecule X represents ...

1.2.1 A genetic cross involving two different characteristics.

1.2.2 The variety of life forms that exist on Earth.

1.2.3 The opening in the skull through which the spinal cord enters.

1.2.4 A group of organisms of the same species living in the same habitat at the same time.

1.2.5 A testable statement that can be accepted or rejected.

1.2.6 A genetic disorder resulting in the non-production of the clotting factor in blood.

1.2.7 Total disappearance of a species from Earth.

1.2.8 A segment of a chromosome that codes for a particular characteristic.

1.2.9 The ability of an organism to walk on two legs.

1.3.1 Which TWO babies (from X, Y and Z) were swopped?

1.3.2 Give the surnames of the biological parents of the two babies that were swopped.

1.3.3 Give the possible genotype(s) of Mr Pule that could have produced baby X.

1.4.1 How many of the following are present in the karyotype: (a) Chromosomes

1.4.1 (b) Autosomes

1.4.1 (c) Gonosomes

1.4.2 How many chromosomes would be present in the gametes produced by this individual?

1.4.3 Is the karyotype in the diagram that of a male or a female?

1.5.1 Which phase is represented in: (a) Diagram 1

1.5.1 (b) Diagram 2

1.5.2 Provide labels for: (A)

1.5.2 (B)

1.5.2 (C)

1.5.3 Give the functions of the parts labelled: (A)

1.5.3 (B)

1.5.4 Are the cells in Diagram 2 haploid or diploid?

1.5.5 Name the process that would have caused variation in structure D.

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