Most Genes Have Many More Than Two Alleles

question 34

Multiple Choice

Most genes have many more than two alleles. However, which of the following is also true?

• A) At least one allele for a gene always produces a dominant phenotype.
• B) Most of the alleles will never be found in a live-born organism.
• C) All of the alleles but one will produce harmful effects if homozygous.
• D) There may still be only two phenotypes for the trait.
• E) More than two alleles in a genotype is considered lethal.

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Definitions:

Formaldehyde

A colorless, strong-smelling gas used in making building materials and many household products, known chemically as CH2O.

Lewis Structure

A diagram that represents the distribution of valence electrons around atoms in a molecule, indicating bonds and lone pairs.

Lewis Structure

A graphical representation of the bonding between atoms in a molecule, showing valence electrons as dots.

Double Bond

A chemical bond in which two pairs of electrons are shared between two atoms, usually making the compound more reactive than a single bond.