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Chapter 5 & 6 Study Guide
For #1 – 8, Please complete the Punnett Square by picking the correct genotype and phenotype for each
square.
t
t
T
1.
Tt
T
2.
Tt
T
t
T
3.
Tt
t
4.
5.
T
t
t
6.
tt
t
7.
8.
1. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
2. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
3. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
4. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
5. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
6. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
7. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
8. Complete the Punnett Square. Pick the correct genotype and phenotype.
A) TT, Tall
B) tt, Short
C) Tt, Tall
D) Tt , Short E) tt, Tall
9. Scientists call an organism that has two different alleles for a trait a
A) hybrid B) trait C) purebred D) factor
10. What does a punnett square show?
A) all the possible outcomes of a genetic cross
C) only the recessive alleles in a genetic cross
B) only the dominant alleles in a genetic cross
D) all of Mendel’s discoveries about genetic crosses
11. An organism’s physical appearance is its
A) genotype B) phenotype C) codominance
D) heterozygous
12. Which term refers to physical characteristics that are studied in genetics?
A) traits
B) offsprings
C) generations
D) hybrids
13. The different forms of a gene are called
A) alleles
B) factors
C) masks
D) traits
14. What does the notation tt mean to geneticists?
A) two dominant alleles
B) two recessive alleles
C) at least one dominant allele
D) one dominant and one recessive allele
Turn Over
15. An organism’s genotype is its
A) genetic makeup
B) feather color
C) physical appearance
D) stem height
16. An organism that has two identical alleles for a trait is
A) codominant
B) tall
C) homozygous
D) heterozygous
17. A heterozygous organism has
A) three different alleles for a trait
C) only one allele for a trait
B) two identical alleles for a trait
D) two different alleles for a trait
18. The passing of traits from parent to offspring is called _____.
A) Genetics
B) alleles
C) genes D) heredity
19. The scientific study of heredity is called __________.
A) Genetics
B) alleles
C) genes
D) Homozygous
20. True or False: Organisms produced by sexual reproduction receive half of their DNA from the female
parent and the other half from the male parent
A) True
B) False
21. True or False: It is possible for two parents with the recessive trait for no dimples (dd) to have
offspring with dimples
A) True
B) False
22. If a all black feathered chicken and all white feathered chicken mates and all it’s offspring has both
black and white feathers, this is an example of _____________.
A) genotype B) probability C) codominance D) homozygous
23. In DNA molecules, adenine always pairs up with _____________.
A) adenine B) thymine C) guanine D) cytosine
24. In DNA molecules, guanine always pairs up with _____________.
A) adenine B) thymine C) guanine D) cytosine