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Name: __________________________________
Year 10 Semester Practice Test – Genetics
Mark: _____/ 20
Question 1
1 mark
What are small stretches of DNA that code for a trait known as?
A. Nucleus
B. Chromosomes
C. Centromeres
D. Gene
Question 2
1 mark
Where is all the genetic information located in a cell?
A. Nucleus
B. Chromosomes
C. Centromeres
D. Gene
Question 3
1 mark
What is the definition of Homozygous?
A. When one allele is dominant and one is recessive
B. When an individual has two sets of the same allele
C. When it is neither dominant or recessive
D. None of the above
Question 4
1 mark
Genotype is…
A. Physical appearance
B. Genetic code
C. Homozygous
D. Dominant
Question 5
1 mark
Which of the following is heterzygous?
A. Bb
B. BB
C. bb
D. b
Question 6
1 mark
An allele whose trait always shows up in the organism when the allele is present:
A. Recessive
B. Dominant
C. Hidden
D. Present
Question 7
1 mark
A male, without a sex-chromosomal disorder, is:
A. XX
B. XXY
C. XY
D. XYY
Question 8
1 mark
Which is the correct order of events in Meiosis?
A. Interphase, Prophase, Metaphase, Anaphase, Telophase
B. Interphase I, Prophase II, Metaphase III, Anaphase IV, Telophase V
C. Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I
D. Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II,
Telophase II
Question 9
3 marks
Brown eye (B) color is dominant to blue eyes. Two parents with brown eyes, but are carriers, have a child.
What is the percentage liklihood for each Genotype AND Phenotype for their child’s eye colour?
Question 10
2 marks
Parents I: AB and O
Parents II: A and O
Parents III: A and AB
Parents IV: O and O
Question 11
2 marks
a) Write the complementary base pair code for the following:
GATACA
b) DNA is comprised of a double-helix structure made of complementary base pairs, and what other structure?
A. Sugar-phosphate ‘backbone’
B. Sugar-phosphate ‘ladder rungs’
C. Sugar-phosphate nuclei
D. Sugar-phosphate alleles
Question 12
2 marks
What is evidence for Evolution? Circle all correct answers.
A. Fossil records – showing progression of physical forms/adaptions over time
B. Biogeography – showing progression of species development either on isolated landmasses or
when continents were once joined (plate tectonics)
C. Embryo development – showing that all animals start life in a physically similar state, with similar
features and structures
D. DNA studies – showing that all species share a large percentage DNA in common with each other
Question 13
3 marks
Explain, using an example, the following statement describing natural selection: