Chapter 18 quiz review

Individuals show a wide range of phenotypes based on a combination of multiple alleles and environmental factors

• Continuous variation

• Linkage

• Epistasis

• Extranuclear inheritance

Two or more genes located on the same chromosome do not assort independently

• Continupus Variation

• Linkage

• Genomic imprinting

• Extranuclear inheritance

Offspring are heterozygous for a dominant trait, but only express their father’s recessive allele. The maternal gene is not expressed during the individual’s lifetime, though this lack of maternal expression is not passed down to future generations.

• Epistasis

• Extranuclear Inheritance

• Genomic imprinting

• Continuous expression

Two genes interact with each other to influence flower color. The first gene controls the ability to make flower pigment. If pigment is made, the second gene codes for either Purple (P) or white (p) flowers.

• Extranuclear inheritance

• Epistasis

• Linkage

• Continuous variation

Only the egg contains genetic information. A mother passes her trait to all her children. Only daughters can pass the same trait on to their children.

• Epistasis

• Genomic imprinting

• Linkage

• Extranuclear inheritance

Which of the following organelles have a genome separate from the genome in the cell nucleus?

• Chloroplast

• Nucleolous

• Mitochondria

• E.R.

The mechanism behind X-inactivation is the production of

• Epistatic effects

• Barr bodies

• Epigenetic effects

• Y-chromosome shortening