5 Written Questions

1. A human genetic disease caused by a dominant allele, characterized by uncontrollable body movements and degeneration of the nervous system; usually fatal 10 to 20 years after the onset of symptoms.
2. A diagram of a family tree showing the occurrence of heritable characters in parents and offspring over multiple generations.
3. A diagram used in the study of inheritance to show the predicted results of random fertilization in genetic crosses.
4. An individual who is heterozygous at a given genetic locus, with one normal allele and one recessive allele. The heterozygote is phenotypically dominant for the character determined by the gene but can pass on the recessive allele to offspring.
5. An allele whose phenotypic effect is not observed in a heterozygote.

5 Matching Questions

1. Polygenic Inheritance
2. Norm of Reaction
3. Quantitative Characters
4. Codominance
5. Complete Dominance

1. a The situation in which the phenotypes of both alleles are exhibited in the heterozygote because both alleles affect the phenotype in separate, distinguishable ways.
2. b The situation in which the phenotypes of the heterozygote and dominant homozygote are indistinguishable.
3. c A heritable feature that varies continuously over a range rather than in either-or fashion.
4. d The range of phenotypes produced by a single genotype due to environmental influences.
5. e An additive effect of two or more genes on a single phenotypic character.

5 Multiple Choice Questions

1. The genetic makeup or set of alleles of an organism.
   1. Pedigree
   2. Genotype
   3. Pleiotropy
   4. Phenotype
2. An observable, heritable feature
   1. Trait
   2. Character
   3. Carrier
   4. Allele
3. The parent individuals from which offspring are derived in studies of inheritance.
   1. P Generation
   2. F1 Generation
   3. Phenotype
   4. F2 Generation
4. A human genetic disease caused by a recessive allele for a dysfunctional enzyme, leading to accumulation of certain lipids in the brain. Seizures, blindness, and degeneration of motor and mental performance usually become manifest a few months after birth followed by death within a few years.
   1. Tay Sachs Disease
   2. Testcross
   3. Epistasis
   4. Sickle Cell Disease
5. Having two identical alleles for the same gene.
   1. Homozygous
   2. Testcross
   3. Heterozygous
   4. Monohybrid

5 True/False Questions

1. Dominant Allele → An allele that is fully expressed in the phenotype of a heterozygote.

   True        False

2. Epistasis → Any detectable variant in a genetic character.

   True        False

3. Testcross → Any detectable variant in a genetic character.

   True        False

4. CVS → Any detectable variant in a genetic character.

   True        False

5. Allele → Any of the alternative versions of a gene that produce distinguishable phenotypic effects.

   True        False