1. A square is used to determine all combinations of how parents can pass on their alleles. 2. is the physical expression of a particular trait?
3. If offspring inherit a dominant black allele and a recessive white allele what is the genotype of Bb?
4. Is the dominant or the recessive allele expressed?
5. The allele is hidden but can be passed down do the next generation
PLEASE HELP ME

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

What field of science did harry hess study?