Two Genes Control Fur Color in Labrador Retrievers

question 52

Multiple Choice

Two genes control fur color in Labrador retrievers.The first gene determines whether the pigment to be deposited in the hair will be black or brown.The second gene determines whether the pigments are put into the dog's hair at all.A dog homozygous for the recessive allele of this second gene will be yellow because no pigment is deposited in its fur.This is an example of

• A) epistasis.
• B) pleiotrophy.
• C) codominance.
• D) incomplete dominance.

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Definitions:

Permeability

The ability of a material to allow fluids or gases to pass through it, often relevant in discussions of soil health, water filtration, and construction materials.

Porosity

Refers to the measure of void spaces in a material, indicating how porous it is.

Clay

A natural, earthy material composed of fine minerals with a grain size of less than 2 micrometers, known for its plasticity when wet and usefulness in ceramics and construction.

Soil Type

A classification based on the physical characteristics of the soil, including texture, fertility, and composition.