Hemophilia is a sex-linked trait. A hemophilic male produces offspring with a carrier female. What are the chances that the female offspring will suffer from hemophilia? What about the male offspring? Make a Punnett square to
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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.

The distribution of related animals and plants across the world

Witch theory suggests all living things are made up of cell or cells