The ability to roll your tongue is controlled by a dominant allele (T); people who have two copies of the recessive allele (t) cannot role their tongues. A cross between parents whose genotypes are TT and tt will produce a family with which of the following phenotypes? all will be tongue-rollers none will be tongue-rollers half will be tongue-rollers, half will not be tongue-rollers 75% will be tongue-rollers, 25% will not be tongue-rollers

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Hematology

Hematology is the branch of biology. Hematology is the medical field that deals with the treatment of blood disorders and cancers, such as hemophilia, leukemia, lymphoma, and sickle-cell anemia. Hematologists and hematopathologists are medical professionals who specialize in illnesses of the blood and its components.