Understanding Inheritance Content Practice A LESSON 2

Name
Date
Class
Content Practice A
LESSON 2
Understanding Inheritance
Directions: On the line before each definition, write the letter of the term that matches it correctly. Each
term is used only once.
1. threadlike structures in cells
A. dominance
2. contain instructions for traits
B. pedigree
3. two different forms of a gene
C. genotype
4. outward appearance
D. heterozygous
E. chromosomes
5. determines outward appearance
F. codominance
6. represented by uppercase letters
G. homozygous
7. represented by lowercase letters
H. incomplete dominance
8. RR
I. genes
9. Rr
J. environmental factors
10. shows possible outcomes of genetic crosses
11. shows inherited traits in a family
K. alleles
L. multiple alleles
M. recessiveness
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12. produces a blend of the parents’ phenotypes
N. polygenic inheritance
13. when both alleles are expressed
O. Punnett square
14. determines human blood type
P. phenotype
15. when multiple genes determine a phenotype
16. can sometimes influence expression of genes
Genetics
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