- 1. Genotype made of the same alleles
A) dominant
B) alleles
C) homozygous
D) heterozygous
E) recessive
- 2. Different forms of genes for a single trait
A) alleles
B) recessive
C) phenotype
D) dominant
E) genotype
- 3. Gene that is always expressed
A) genotype
B) alleles
C) dominant
D) recessive
E) heterozygous
- 4. Gene that is expressed only in homozygous state
A) recessive
B) genotype
C) alleles
D) phenotype
E) dominant
- 5. Genotypes made of two different alleles
A) homozygous
B) recessive
C) phenotype
D) heterozygous
E) dominant
- 6. Which one of the given alleles are all homozygous dominant?
A) Aa, BB, CC
B) aa, bb, cc
C) AA, Bb, cc
D) AA, BB, CC
E) Aa, Bb, Cc
- 7. Which one of the given alleles are all recessive?
A) XX, YY, ZZ
B) Xx, yy, Zz
C) xx, yy ZZ
D) XX, Yy, Zz
E) xx, yy, zz
- 8. Genotype in which recessive gene must show
A) rr
B) Yy
C) Bb
D) Aa
E) Rr
- 9. What do the letter on the outside of the Punnett square stand for?
A) offspring
B) traits from offspring
C) children
D) siblings
E) traits from parents
- 10. In guinea pigs, short hair, S, is dominant to long hair, s. a. One guinea pig is Ss and one is ss. How many are short hair (Ss or SS)?
A) 4
B) 3
C) 2
D) 5
E) 1
- 11. In guinea pigs, short hair, S, is dominant to long hair, s. a. One guinea pig is Ss and one is ss How many are long hair(ss)?
A) 4
B) 5
C) 1
D) 3
E) 2
- 12. In guinea pigs, short hair, S, is dominant to long hair, s. Both Guinea pigs are heterozygous for short hair(Ss). How many are short hair (SS or Ss)?
A) 5
B) 1
C) 3
D) 4
E) 2
- 13. In guinea pigs, short hair, S, is dominant to long hair, s. Both Guinea pigs are heterozygous for short hair(Ss). How many are long hair (ss)?
A) 4
B) 2
C) 3
D) 1
E) 5
- 14. Hornless (H) in cattle is dominant over horned (h). A homozygous hornless bull is mated with a homozygous horned cow. What will be the genotype of the first generation?
A) HH heterozygous hornless
B) HH homozygous hornless
C) hh heterozygouns horned
D) hh homozygous horned
E) Hh heterozygous hornless
- 15. Hornless (H) in cattle is dominant over horned (h). A homozygous hornless bull is mated with a homozygous horned cow. What will be the phenotype of the first generation?
A) both dominant
B) recessive
C) Hornless
D) horned
E) one side is horned and the other side hornless
- 16. In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. What is the father phenotype?
A) neither
B) roller
C) non-roller
D) regular
E) roller and non-roller
- 17. In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. What is the father's genotype?
A) Rr
B) RrR
C) rr
D) rRR
E) RR
- 18. In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. What is the mother's phenotype?
A) neither
B) one side of the tongue roll and the other side doesn't.
C) tongue roller
D) both
E) non-roller
- 19. In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. What is the mother's genotype?
A) rr homozygous non-roller
B) neither of the traits are shown.
C) RR homozygous roller
D) Rr heterozygous roller
- 20. In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling.
A) 50% probability
B) 5% probability
C) 10% probability
D) 75 probability
E) 25% probability
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