5 Written Questions
5 Matching Questions
- Dominant Allele
- Recessive Allele
- Norm of Reaction
- a The range of phenotypes produced by a single genotype due to environmental influences.
- b Any of the alternative versions of a gene that produce distinguishable phenotypic effects.
- c Having two identical alleles for the same gene.
- d An allele that is fully expressed in the phenotype of a heterozygote.
- e An allele whose phenotypic effect is not observed in a heterozygote.
5 Multiple Choice Questions
- The first filial offspring in a series of genetic crosses.
- The physical and physiological traits of an organism, which are determined by its genetic makeup.
- The ability of a single gene to have multiple effects.
- A diagram used in the study of inheritance to show the predicted results of random fertilization in genetic crosses.
- 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.
5 True/False Questions
Carrier → An observable, heritable feature
Dihybrid → An organism that is heterozygous with respect to two genes of interest. All the offspring from a cross between parents doubly homozygous for different alleles are dihybrids.
Amniocentesis → A technique of prenatal diagnosis in which amniotic fluid, obtained by aspiration from a needle inserted into the uterus, is analyzed to detect certain genetic and congenital defects in the fetus.
Cystic Fibrosis → A human genetic disorder caused by a recessive allele for a chloride channel protein; characterized by an excessive secretion of mucus and consequent vulnerability to infection; fatal if untreated.
Trait → Any detectable variant in a genetic character.