Biology Quiz – Genetics
1. The hereditary units in cells are called:
A
genes
B
genetics
C
characteristics
2. How many chromosomes are contained in one human body cell?
A
50
B
46
C
23
3. How many chromosomes are contained in one egg or one sperm?
A
2
B
23
C
46
4. The human sex chromosomes are:
A
XX
B
XYY
C
XY
5. In a pedigree, what shape indicates males with the characteristic being studied?
A
shaded circle
B
unshaded circle
C
shaded square
6. An example of a genotype is:
A
Bb
B
purebred brown eyes
C
hybrid blue eye colour
7. When one characteristic is more strongly inherited than another characteristic, it is
said to be:
A
monohybrid
B
recessive
C
dominant
8. If a purebred brown-eyed man marries a purebred blue-eyed woman, what colour
is most likely for their children's eye colour?
A
blue
B
brown
C
half and half
9. If both parents are hybrid for brown eye colour, the ratios of eye colours of their
possible offspring are:
A
all blue
B
3 brown:1 blue
C
1 brown:2 blue
10. In pea plants, tallness is dominant to dwarfness. What are the possible offspring
of a hybrid tall plant and a dwarf plant?
A
half tall and half dwarf
B
all tall
C
3/4 tall and 1/4 dwarf
11. In fruit flies, straight wing is dominant over curly wing. What are the possible
offspring of a homozygous or purebred straight winged fly and a curly winged
fly?
A
half straight winged and half curly winged
B
all straight winged
C
insufficient information given
12. Albinism in humans is caused by a recessive allele. A normal couple have 4
children - 3 normal and 1 albino. What are the genotypes of the parents?
A
only one parent carries the albino allele
B
one parent is purebred for albinism and the other parent is hybrid
C
both hybrid for albinism
13. With reference to the question above, what is the chance that the next child will
be albino?
A
1/4
B
50%
C
nearly 100%
14. In cats, short hair is dominant over long hair. What is the ratio of possible
offspring if a heterozygous or hybrid short-haired cat mates with a long-haired
cat?
A
half and half
B
all long-haired
C
1 short-haired:1 long-haired
15. In chickens, black eye colour is dominant to blue eye colour. If a purebred blackeyed rooster mated with a purebred blue-eyed hen, what is most likely for the next
generation's eye colour characteristics?
A
all blue-eyed
B
all black-eyed
C
insufficient information given
Your Answers
Q 1:
Q 6:
Q11:
A
A
B
Q 2:
Q 7:
Q12:
B
C
C
Q 3:
Q 8:
Q13:
B
B
A
Q 4:
Q 9:
Q14:
A
B
C
Q 5:
Q10:
Q15:
C
A
B
Correct Answers
Q 1:
Q 6:
Q11:
A
A
B
15/15 (100%)
Q 2:
Q 7:
Q12:
B
C
C
Q 3:
Q 8:
Q13:
B
B
A
Q 4:
Q 9:
Q14:
A
B
C
Q 5:
Q10:
Q15:
C
A
B