BIO 123 PATTERNS OF GENETIC INHERITANCE QUIZ AND ANSWERS
1. What are alleles?
A. genes for different traits, such as hair color and eye color
B. locations of genes on chromosomes
C. alternative forms of a gene for a single trait, such as blue eyes and brown eyes
D. recessive forms of a kind of characteristic carried by genes
E. dominant forms of a kind of characteristic carried by genes
2. A testcross occurs when an individual with the is crossed with an
individual having the .
A. heterozygous dominant, homozygous recessive
B. homozygous dominant, heterozygous recessive
C. dominant phenotype, recessive phenotype
D. dominant phenotype, dominant phenotype
E. homozygous recessive, homozygous recessive
3. This figure shows a human pedigree. Based on the information presented in this figure, what
type of disorder would this be?
A. due to multiple alleles
B. autosomal recessive
C. incomplete dominance
D. codominant
E. autosomal dominant
, 4. If an organism shows a recessive phenotype, such as short pea plants, it can be
A. either TT or tt.
B. only tt.
C. only TT.
D. either TT or Tt.
E. only Tt.
5. Which of the following terms would be used for an allele which can mask the
expression of another allele?
A. locus
B. genotype
C. phenotype
D. dominant
E. recessive
6. Mendel's law of segregation implies that the two members of an allelic pair
A. are segregated pair wise.
B. are assorted dependently.
C. are distributed to the same gamete.
D. are distributed to separate gametes.
E. are always code for the identical trait or feature.
7. Complete the following statements about Mendel's law of segregation. Not all choices
will be used.
Mendel explained the 3:1 ratio in the F2 generation of his crosses by the F1 parents
having two factors of each TRAIT.
During formation of the GAMETES, the factor for each trait SEGREGATE so
that each gamete carries only one copy.
Random FUSION of all possible gametes occurs upon FERTILIZATION giving
each new individual two factors for each trait.
The above statements summarize Mendel’s LAW OF SEGREGATION.
8. Which of the following terms is represented by word descriptions, such as brown or tall?
A. dominance
B. homozygous
C. phenotype
D. genotype
E. allele
1. What are alleles?
A. genes for different traits, such as hair color and eye color
B. locations of genes on chromosomes
C. alternative forms of a gene for a single trait, such as blue eyes and brown eyes
D. recessive forms of a kind of characteristic carried by genes
E. dominant forms of a kind of characteristic carried by genes
2. A testcross occurs when an individual with the is crossed with an
individual having the .
A. heterozygous dominant, homozygous recessive
B. homozygous dominant, heterozygous recessive
C. dominant phenotype, recessive phenotype
D. dominant phenotype, dominant phenotype
E. homozygous recessive, homozygous recessive
3. This figure shows a human pedigree. Based on the information presented in this figure, what
type of disorder would this be?
A. due to multiple alleles
B. autosomal recessive
C. incomplete dominance
D. codominant
E. autosomal dominant
, 4. If an organism shows a recessive phenotype, such as short pea plants, it can be
A. either TT or tt.
B. only tt.
C. only TT.
D. either TT or Tt.
E. only Tt.
5. Which of the following terms would be used for an allele which can mask the
expression of another allele?
A. locus
B. genotype
C. phenotype
D. dominant
E. recessive
6. Mendel's law of segregation implies that the two members of an allelic pair
A. are segregated pair wise.
B. are assorted dependently.
C. are distributed to the same gamete.
D. are distributed to separate gametes.
E. are always code for the identical trait or feature.
7. Complete the following statements about Mendel's law of segregation. Not all choices
will be used.
Mendel explained the 3:1 ratio in the F2 generation of his crosses by the F1 parents
having two factors of each TRAIT.
During formation of the GAMETES, the factor for each trait SEGREGATE so
that each gamete carries only one copy.
Random FUSION of all possible gametes occurs upon FERTILIZATION giving
each new individual two factors for each trait.
The above statements summarize Mendel’s LAW OF SEGREGATION.
8. Which of the following terms is represented by word descriptions, such as brown or tall?
A. dominance
B. homozygous
C. phenotype
D. genotype
E. allele
