sentences: a heterozygous black (bb) mouse is crossed with homozygous black mouse (bb) & bb means heterozygous dominant & bb means homozygous dominant & if a heterozygous dominant organism is crossed homozygous dominant organism , then the offspring will have a 0% probability of having recessive trait ->  the offspring of the mice will have a 0% probability to express recessive trait  the offspring of the mice will have a 0% probability to express recessive trait & brown fur is a recessive trait in mouse -> the offspring of the mice will have a 0% probability to be brown