What is a Genotype that has two of the SAME case letters? What the GENE looks like, or the coding for a particular gene?

What is a Genotype that has two DIFFERENT case letters?

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome