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Biology 822
Mendelian Genetics Test Review Sheet
Write detailed explanations of all the following
Chapter 9, Fundamentals of Genetics
1) Summarize the three main steps of Mendel’s experiments and include the terminology P1, F1, and
F2 generation.
1
2
3
2) State the law of segregation.
3) State the law if independent assortment.
4) What is the purpose of a testcross?
5) What is the difference between a dominant trait and a recessive trait?
6) Define the following terms:
 complete dominance

incomplete dominance

co-dominance

Trait

Self-pollination

Cross-pollination

Allele

Gene

Phenotype

Genotype

Homozygous

Heterozygous

Monohybrid cross

Dihybrid cross
Chapter 12, Inheritance Patterns and Human Genetics Answer in detail
1) What are X-linked genes?
2) What is a linkage group?
3) What is a pedigree?
4) What is the difference between a chromosome mutation and a gene mutation?
5) Name three recessive X-linked disorders.
6) What are multiple allele traits? Give an example.
7) Which blood type is considered to be the “universal donor”? Explain why.
8) Which blood type is considered to be the “universal recipient”? Explain why.
9) What are polygenic traits? Give an example.
Genetics Problems Make a problem for each of the following,
Write: 1. Let statement e.g. Let W= widows peak, w= straight hairline
2. genotype cross e.g. Ww X ww
3. Punnett square
4. express predicted genotype and phenotypes in ratios as well and in percentages
Crosses involving one (pea plant height), two (pea color and height), and three (hair color, eye
color and height) traits
1. Cross a heterozygous tall pea plant with a heterozygous tall plant. Tall is dominant (T).
Short is recessive (t)
1. Let statement e.g. Let W= widows peak, w= straight hairline
2. genotype cross e.g. Ww X ww
3. Punnett square
4. express predicted genotype and phenotypes in ratios as well and in percentages
1) Crosses involving incomplete dominance (blending)
Cross a homozygous red carnatiom RR with a homozygous white carnation WW. Carnation color has
incomplete dominance (blending)
1. Let statement e.g. Let W= widows peak, w= straight hairline
2. genotype cross e.g. Ww X ww
3. Punnett square
4. express predicted genotype and phenotypes in ratios as well and in percentages
2) Crosses involving multiple alleles
3) Crosses involving X-linked traits
a. hemophilia
b. color blindness