Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Inheritance Patterns and Human Genetics
In the space provided, write the letter of the description that best matches the term
or phrase.
_____ 1. causes death, often before birth
a. linked genes
_____ 2. chromosome breaks and piece
reattaches backward
b. map unit
_____ 3. chromosome not involved in sex
determination
d. deletion
c. frameshift mutation
e. lethal mutation
f. sex chromosome
_____ 4. chromosome that determines sex
g. genetic disorder
_____ 5. autosomal dominant trait
h. Huntington’s disease
_____ 6. sample is taken from tissue between
the uterus and the placenta
i. germ-cell mutation
_____ 7. sample is taken from fluid-filled sac
k. amniocentesis
_____ 8. one nucleotide replaces another
l. genetic counseling
j. autosome
m. inversion
_____ 9. disease caused by a mutation
n. insertion mutation
_____ 10. loss of a piece of chromosome
o. gene therapy
_____ 11. offers information about genetic
makeup
p. chromosome map
_____ 12. influenced by both genetics and the
environment
r. chorionic villi sampling
q. substitution
s. complex characters
t. somatic-cell mutation
_____ 13. diagram that shows the location of
genes
_____ 14. occurs in a gamete
_____ 15. frequency of crossing-over
_____ 16. occurs in body cells
_____ 17. places healthy copy of gene into a
person whose gene is defective
_____ 18. nucleotides are added to DNA
_____ 19. genes that are inherited together
_____ 20. all amino acids downstream are changed
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Biology
23
Inheritance Patterns & Human Genetics
Name ______________________________ Class ___________________ Date __________________
Inheritance Patterns and Human Genetics continued
Write the correct term from the list below in the space next to its definition.
carrier
codominance
incomplete dominance
multiple alleles
nondisjunction
pedigree
point mutation
polygenic
sex-influenced trait
sex-linked trait
translocation
______________________21.a family history that shows how a trait is inherited
______________________22.trait whose allele is located on the X chromosome
______________________23.when several genes influence a trait
______________________24.when an individual displays a trait that is
intermediate between the two parents
______________________25.two dominant alleles are expressed at the
same time
______________________26.genes with three or more alleles
______________________27.a piece of chromosome that attaches to a
nonhomologous chromosome
______________________28.substitution, addition, or deletion of a nucleotide
______________________29.having one copy of a recessive allele
______________________30.males and females show different phenotypes but
have the same genotype
______________________31.failure of homologues to separate during meiosis
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Biology
24
Inheritance Patterns & Human Genetics