Ablack mouse mates with a brown mouse, why are no brown offspring produced

Because the black mouse is homozygous.

The black color in mouses is dominant, and the brown is recessive. When a parent is homozygous, their children need to have their gene. Because in this case the trait is black, it dominates brown in all children.

The table is BB×bb = Bb, Bb, Bb, Bb = 100% heterozygous genotype = 100% black phenotype.

The black mouse has a dominant gene and the brown mouse has a recessive gene

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.