Genetics Quiz

1. The number of chromosomes in a human body cell is:
A 23 pairs
B 23
C 2 pairs (one from each parent)
2. The sex chromosomes of a normal human male are:
A XX
B XXXX
C XY
3. The chromosomes that are not sex chromosomes are called:
A X and Y
B autosomes
C chromatin
4. In a pedigree, an affected male is shown by a:
A shaded square
B shaded circle
C blank circle
5. The inherited appearance is the:
A genotype
B phenotype
C co-dominance
6. Homozygous is known as:
A hybrid
B pure-breeding
C wild type
7. The less frequently inherited characteristic is called:
A co-inherited
B dominant
C recessive
8. Genes determining sex-linked conditions are found on the:
A autosomes
B X chromosome
C Y chromosome
9. A disease of blood clotting inability is:
Aheparin
Bhaemochromatosis
Chaemophilia
10. The ratio of phenotypes of offspring of a monohybrid cross is:
A1:2:1
B9:3:3:1
C3:1
11. Somatic cells are:
Agametes
Bbody cells
Csex cells
12. If the phenotype is brown eye colour, then the genotype is:
ABB or Bb
BBB only
Cbb only
13. How can one determine the exact genotype of an animal with a dominant characteristic?
ABreed it once with an animal of similar appearance
BBreed it with an animal that is homozygous recessive for that characteristic
CTake a biopsy to determine its chromosome number
14. The parent who determines the sex of a child is the:
Amother
Bfather
Cneither parent
15. What are the possible children's blood type phenotypes if parents have O and AB blood types?
AA, B, AB
BA, B
CA, O
 
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