- 1. Traits are characteristics that can only be passed from a (n) ____________ thing to its _____________
A) single celled, nucleus
B) asexual, organs
C) living, offspring
D) living, ancestors
- 2. The process by which traits are passed from parents to offspring is called
A) recessive genes
B) dominance
C) meiosis
D) heredity
- 3. For each trait, there are __________ allele possibilities
A) 4 gamete
B) 2
C) 1
D) unlimited
- 4. Genetic make up of an organism
A) genotypic
B) alleles
C) phenotype
D) genotype
- 5. The physical trait that is expressed in an individual
A) phenotype
B) homozygous
C) genotype
D) heterozygous
A) genetics
B) Punnett Square
C) alleles
D) traits
- 7. When alleles of an organism are either both dominant or recessive, this is called
A) heterozygous
B) recessive
C) dominant
D) homozygous
- 8. When one allele masks the presence of another allele, the 1st allele is said to be
A) homozygous
B) dominant
C) recessive
D) heterozygous
- 9. When the alleles for a trait that are present in an organism are not the same
A) genetic
B) heredity
C) homozygous
D) heterozygous
- 10. In cattle, black coat color is dominant over white. If a heterozygous black-coated cow is mated with a white-coated bull, how many different phenotypes with respect to coat color could be expected in the offspring?
A) 4
B) 1
C) 2
D) 3
- 11. What is the the genetic makeup of a tall plant that is homozygous dominant.
T = tall
t = short
A) TT
B) tt
C) Tt
- 12. A mother has the ability to roll her tongue and a genetic makeup of Tt and a father does not have the ability to roll his tongue and is pure recessive, so his genetic makeup is tt. Predict the percent probability of having a child with a who can roll his/her tongue.
A) 75%
B) 50%
C) 100%
D) 25%
- 13. The different forms of a gene for any given trait
A) heterozygous
B) alleles
C) homozygous
D) genetic make up
- 14. It is proper to put the ____ allele on the top of the Punnett Square
A) paternal
B) maternal
- 15. For an offspring to _____ a recessive trait, both parents must have at least one ______ allele in their genotype
A) dominate, dominant
B) control, recessive
C) express, recessive
- 16. In this image, what are the genotypes of the male and of the female parents
A) bb, Bb
B) Bb, Bb
C) Bb, bb
D) bb, bb
- 17. If A stands for astigmatism and a stands for normal vision, what are the phenotype ratios shown in this Punnett Square
A) homozygous
B) 1:2:1 , AA: Aa: aa
C) heterozygous
D) 3 astigmatism : 1 normal vision
- 18. In this image, the genotype of the black parent is ______ and the genotype of the blue parent is
A) homozygous recessive, heterozygous
B) homozygous dominant, homozygous recessive
C) heterozygous, homozygous recessive
D) heterozygous, heterozygous
- 19. In this image, the genotypes of the 4 offspring are
A) all are Ff
B) FF and ff
C) all are ff
D) FF, Ff, ff
- 20. The name of the person who pioneered genetics in the 19th century
A) Isaac Newton
B) Charles Darwin
C) Gregor Mendel
D) Reginald Punnett
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