Name: ____________________________________
Class: _____________
Date: _____________
Lesson Assessment: Genetics
1. Assuming simple dominance, out of a total of 160 offspring, how many are expected to show one OR both
dominant traits from the cross: AaBb AaBb ?
a) 90
b) 150
c) 160
d) 30
2. Which of the following disorders is more likely to be inherited by males than females?
a) hemophilia
b) Parkinson's
c) trisomy
d) Huntington's
3. Two genes that are inherited together are said to be _____.
a) codominant
b) linked
c) allelic
d) conjoined
4. The exchange of genetic material between non sister chromatids is called ______?
a) segregation
b) translation
c) crossing over
d) inbreeding
5. What is the expected number of different offspring genotypes produced by a cross between heterozygotes?
a) 9
b) 1
c) 3
d) 2
PAGE 1
Name: ____________________________________
Class: _____________
Date: _____________
Lesson Assessment: Genetics
6. What is the expected number of offspring phenotypes produced by a cross between heterozygotes for a gene
that shows codominance?
a) 2
b) 3
c) 1
d) 9
7. The allelic composition of an organism is called the _____.
a) sequence
b) phenotype
c) genotype
d) karyotype
8. What is the name of mode of inheritance in which both alleles are expressed in the heterozygote?
a) simple dominance
b) codominance
c) incomplete dominance
d) simple recessive
9. What is the term used when one gene modifies the expression of a second gene?
a) autosomal dominant
b) epistasis
c) multiple alleles
d) polygenic
10. A linkage map is based on the frequency of _____.
a) crossing over
b) nondisjunction
c) mutations
d) fertilizations
PAGE 2
ANSWER KEY
1. b
2. a
3. b
4. c
5. c
6. b
ANSWER KEY Page 1
7. c
8. c
9. b
10. a