Erin
Practice: Monohybrid Crosses
Part 1; Match the following vocabulary terms with the best definition.
1.
Gene
2.
Dominant
3.
Recessive
4.
Heterozygous
5.
Homozygous
6.
Genotype
7.
Phenotype
8.
Homologous chromosomes
9.
Allele
A. A version of a gene
B. The actual alleles an individual inherits from their parents
C. The allele that is always expressed, if present
D. When homologous chromosomes have the same alleles on them
E. Section of DNA that codes for a protein and/or trait
F. The allele that is only "seen" in the homozygous state
G. When homologous chromosomes have different alleles on them
H. A pair of chromosomes with genes in the same locations
I. The physical trait expressed
Part 2: Circle the answer choice(s) that best represent each statement.
10. Homozygous dominant genotypes
Aa
BB CC Dd EE ff Gg
11. Heterozygous genotypes
Aa
BB
CC
Dd EE ff Gg
12. Homozygous recessive genotypes
Aa
BB CC
Dd EE ff
Gg
13. Genotypes that would result in the dominant phenotype being expressed
Aa BB cc Dd EE ff Gg
14. Genotypes that would result in the recessive phenotype being expressed
Aa BB cc Dd EE ff Gg
Part 3: Answer the following questions about Punnett squares.
15. What do the letters on the outside of a Punnett square represent?
16. What do the letters on the inside of a Punnett square represent?
17. How are Punnett squares useful tools?
leredity Unit