NSC Life Sciences Genetics and Inheritance: 1.1.1 Which of the following mig

Question

1.1.1 Which of the following might result in human symptoms in humans?
A. A gene deletion on chromosome 21
B. Failure of the chromosome pair to separate during meiosis I
C. Variation within a region is introduced through
D. A missense mutation and special selection.

1.1.2 Variation which is not natural selection.
A. random mating
B. sexual reproduction
C. mutation and fitness
D. migration, natural selection, and fitness.

1.1.3 African cichlid species and Darwin’s finches.
Both have…
A. similar modes of speciation.
B. been separated by rivers forming fronts.
C. lived in similar habitats.
D. experienced selective pressures.

1.1.4 The diagram below shows Tihani’s image, a set that may be the ancestor of the first organism to evolve.

According to Tihani, the species of fish may have evolved the ability to look for shelter in:
A. the environment
B. the characteristics of the fish
C. the process of natural selection
D. the evolutionary pressures of all species involved in their adapting.

1.1.5 The diagram below shows some of the processes, molecules, and structures that are involved in producing a cell.

Which ONE of the following is the CORRECT principal role of the “C” in the diagram?
A. Process 1 pink
B. Process 2 pink
C. Process 3 pink
D. Process 3.2 red

1.1.6 A homozygous purple flowering plant (P) is crossed with a pink flowering plant (F). With names the genotypes in the following diagram:
A. purple has the pink-flowering recessive mutations.
B. pink has the pink-flowering mutation found in the F1 generation.
C. purple has the pink-flowering inversion in the F1 generation.
D. pink has the number of chromosomes in the F2 individuals.

1.1.7 Which ONE of the following scientists discovered fossils of Homo sapiens and Homo neanderthal?
A. Raymond Dart
B. Lee Berger
C. Louis Leakey
D. Tim White

1.1.8 The diagram below represents characteristics of wild sunflowers with sunflowers that have been artificially selected.
Which ONE of the following characteristics was found undesirable by farmers?
A. Number of branches
B. Plant height
C. Flower head diameter
D. Number of seed clusters

1.1.9 The table below shows evolution.
What type of evidence for evolution is being used in this table?
A. Fossils
B. Homologous structures
C. Antibiotics
D. Biogeography

1.1.10 Give the correct biological term for each of the following descriptions, write down their correct term under the corresponding number: (1.1.1 to 1.1.3 in the ANSWER BOOK).
A. Similar structures in different organisms indicating descent with modification
B. Large, paired areas in the human brain that are used for learning food.
C. The mass of genetic material found in the nucleus during division.

1.1.11 Having a polygenic trait.
Indicate whether each of the statements in COLUMN I apply to, ONLY, BOTH and NOT a single item in COLUMN II as follows: (1, 2, and 3 in the answer book).
ATHLETICISM

1.1.12 Long and narrow
1.1.13 Homogenous
1.1.14 Phenotypically plastic.

1.1.15 The diagram below shows meiosis.
All the chromosomes in a cell that is undergoing mitotic cell division.

1.1.16 What were the number of differences in the amino acid sequence between the species as described above?

1.1.17 Compare the process of meiosis and mitosis. Describe the differences.

1.1.1 Which of the following might result in human symptoms in humans? A - NSC Life Sciences - Question 1 - 2020 - Paper 2

Worked Solution & Example Answer:1.1.1 Which of the following might result in human symptoms in humans? A - NSC Life Sciences - Question 1 - 2020 - Paper 2

Which of the following might result in human symptoms in humans?

Variation which is not natural selection.

African cichlid species and Darwin’s finches.

The diagram below shows Tihani’s image, a set that may be the ancestor of the first organism to evolve.

Which ONE of the following is the CORRECT principal role of the “C” in the diagram?

A homozygous purple flowering plant (P) is crossed with a pink flowering plant (F).

Which ONE of the following scientists discovered fossils of Homo sapiens and Homo neanderthal?

Which ONE of the following characteristics was found undesirable by farmers?

What type of evidence for evolution is being used in this table?

Give the correct biological term for each of the following descriptions.

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