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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:
Aall blue
B3 brown:1 blue
C1 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?
Ahalf tall and half dwarf
Ball tall
C3/4 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?
Ahalf straight winged and half curly winged
Ball straight winged
Cinsufficient 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?
Aonly one parent carries the albino allele
Bone parent is purebred for albinism and the other parent is hybrid
Cboth hybrid for albinism
13. With reference to the question above, what is the chance that the next child will be albino?
A1/4
B50%
Cnearly 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?
Ahalf and half
Ball long-haired
C1 short-haired:1 long-haired
15. In chickens, black eye colour is dominant to blue eye colour. If a purebred black-eyed rooster mated with a purebred blue-eyed hen, what is most likely for the next generation's eye colour characteristics?
Aall blue-eyed
Ball black-eyed
Cinsufficient information given

 

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